157732978 has 16 divisors (see below), whose sum is σ = 255487680. Its totient is φ = 72603216.

The previous prime is 157732973. The next prime is 157732997. The reversal of 157732978 is 879237751.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (157732973) 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, 1851 + ... + 17857.

It is an arithmetic number, because the mean of its divisors is an integer number (15967980).

Almost surely, 2^157732978 is an apocalyptic number.

157732978 is a deficient number, since it is larger than the sum of its proper divisors (97754702).

157732978 is a wasteful number, since it uses less digits than its factorization.

157732978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16401.

The product of its digits is 740880, while the sum is 49.

The square root of 157732978 is about 12559.1790336789. The cubic root of 157732978 is about 540.3072988000.

The spelling of 157732978 in words is "one hundred fifty-seven million, seven hundred thirty-two thousand, nine hundred seventy-eight".