157537840 has 20 divisors (see below), whose sum is σ = 366275664. Its totient is φ = 63015104.

The previous prime is 157537817. The next prime is 157537871. The reversal of 157537840 is 48735751.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×157537840³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 157537793 and 157537802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984532 + ... + 984691.

Almost surely, 2^157537840 is an apocalyptic number.

157537840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157537840 is an abundant number, since it is smaller than the sum of its proper divisors (208737824).

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

157537840 is a wasteful number, since it uses less digits than its factorization.

157537840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969236 (or 1969230 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 157537840 is about 12551.4078891573. The cubic root of 157537840 is about 540.0843946742.

The spelling of 157537840 in words is "one hundred fifty-seven million, five hundred thirty-seven thousand, eight hundred forty".