157684840 has 16 divisors (see below), whose sum is σ = 354790980. Its totient is φ = 63073920.

The previous prime is 157684837. The next prime is 157684867. The reversal of 157684840 is 48486751.

It can be written as a sum of positive squares in 2 ways, for example, as 145588356 + 12096484 = 12066^2 + 3478^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971021 + ... + 1971100.

Almost surely, 2^157684840 is an apocalyptic number.

157684840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157684840 is an abundant number, since it is smaller than the sum of its proper divisors (197106140).

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

157684840 is a wasteful number, since it uses less digits than its factorization.

157684840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942132 (or 3942128 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 157684840 is about 12557.2624405162. The cubic root of 157684840 is about 540.2523283484.

The spelling of 157684840 in words is "one hundred fifty-seven million, six hundred eighty-four thousand, eight hundred forty".