194432740 has 24 divisors (see below), whose sum is σ = 432327672. Its totient is φ = 73198080.

The previous prime is 194432737. The next prime is 194432741. The reversal of 194432740 is 47234491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2166784 + 192265956 = 1472^2 + 13866^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 194432696 and 194432705.

It is not an unprimeable number, because it can be changed into a prime (194432741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285591 + ... + 286270.

It is an arithmetic number, because the mean of its divisors is an integer number (18013653).

Almost surely, 2^194432740 is an apocalyptic number.

194432740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194432740 is an abundant number, since it is smaller than the sum of its proper divisors (237894932).

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

194432740 is a wasteful number, since it uses less digits than its factorization.

194432740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571887 (or 571885 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 194432740 is about 13943.9140846464. The cubic root of 194432740 is about 579.3261496400.

The spelling of 194432740 in words is "one hundred ninety-four million, four hundred thirty-two thousand, seven hundred forty".