157540840 has 16 divisors (see below), whose sum is σ = 354466980. Its totient is φ = 63016320.

The previous prime is 157540807. The next prime is 157540841. The reversal of 157540840 is 48045751.

157540840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 152621316 + 4919524 = 12354^2 + 2218^2 .

It is a junction number, because it is equal to n+sod(n) for n = 157540796 and 157540805.

It is not an unprimeable number, because it can be changed into a prime (157540841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969221 + ... + 1969300.

Almost surely, 2^157540840 is an apocalyptic number.

157540840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157540840 is an abundant number, since it is smaller than the sum of its proper divisors (196926140).

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

157540840 is a wasteful number, since it uses less digits than its factorization.

157540840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938532 (or 3938528 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 157540840 is about 12551.5273970939. The cubic root of 157540840 is about 540.0878229361.

The spelling of 157540840 in words is "one hundred fifty-seven million, five hundred forty thousand, eight hundred forty".