190987740 has 48 divisors (see below), whose sum is σ = 594185760. Its totient is φ = 50929920.

The previous prime is 190987733. The next prime is 190987763. The reversal of 190987740 is 47789091.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176301 + ... + 177380.

It is an arithmetic number, because the mean of its divisors is an integer number (12378870).

Almost surely, 2^190987740 is an apocalyptic number.

190987740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190987740 is an abundant number, since it is smaller than the sum of its proper divisors (403198020).

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

190987740 is a wasteful number, since it uses less digits than its factorization.

190987740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353699 (or 353691 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 190987740 is about 13819.8314027343. The cubic root of 190987740 is about 575.8841998111.

The spelling of 190987740 in words is "one hundred ninety million, nine hundred eighty-seven thousand, seven hundred forty".