157198540 has 24 divisors (see below), whose sum is σ = 337795920. Its totient is φ = 61416768.

The previous prime is 157198523. The next prime is 157198543. The reversal of 157198540 is 45891751.

It is a happy number.

157198540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×157198540² = 49422761956263200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 157198493 and 157198502.

It is not an unprimeable number, because it can be changed into a prime (157198543) 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, 90535 + ... + 92254.

It is an arithmetic number, because the mean of its divisors is an integer number (14074830).

Almost surely, 2^157198540 is an apocalyptic number.

157198540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157198540 is an abundant number, since it is smaller than the sum of its proper divisors (180597380).

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

157198540 is a wasteful number, since it uses less digits than its factorization.

157198540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182841 (or 182839 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 157198540 is about 12537.8841915213. The cubic root of 157198540 is about 539.6963770979.

The spelling of 157198540 in words is "one hundred fifty-seven million, one hundred ninety-eight thousand, five hundred forty".