190428840 has 128 divisors (see below), whose sum is σ = 725472000. Its totient is φ = 43524864.

The previous prime is 190428829. The next prime is 190428851. The reversal of 190428840 is 48824091.

190428840 is a `hidden beast` number, since 190 + 428 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (190428829) and next prime (190428851).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 190428795 and 190428804.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5035 + ... + 20154.

It is an arithmetic number, because the mean of its divisors is an integer number (5667750).

Almost surely, 2^190428840 is an apocalyptic number.

190428840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190428840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362736000).

190428840 is an abundant number, since it is smaller than the sum of its proper divisors (535043160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

190428840 is a wasteful number, since it uses less digits than its factorization.

190428840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25216 (or 25206 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 190428840 is about 13799.5956462499. The cubic root of 190428840 is about 575.3219016720.

The spelling of 190428840 in words is "one hundred ninety million, four hundred twenty-eight thousand, eight hundred forty".