157992740 has 24 divisors (see below), whose sum is σ = 342488832. Its totient is φ = 61158240.

The previous prime is 157992719. The next prime is 157992743. The reversal of 157992740 is 47299751.

It is a junction number, because it is equal to n+sod(n) for n = 157992691 and 157992700.

It is not an unprimeable number, because it can be changed into a prime (157992743) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 126794 + ... + 128033.

It is an arithmetic number, because the mean of its divisors is an integer number (14270368).

Almost surely, 2^157992740 is an apocalyptic number.

157992740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157992740 is an abundant number, since it is smaller than the sum of its proper divisors (184496092).

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

157992740 is a wasteful number, since it uses less digits than its factorization.

157992740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254867 (or 254865 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 157992740 is about 12569.5162993649. The cubic root of 157992740 is about 540.6037371882.

The spelling of 157992740 in words is "one hundred fifty-seven million, nine hundred ninety-two thousand, seven hundred forty".