157744772 has 6 divisors (see below), whose sum is σ = 276053358. Its totient is φ = 78872384.

The previous prime is 157744739. The next prime is 157744781. The reversal of 157744772 is 277447751.

It can be written as a sum of positive squares in only one way, i.e., 79138816 + 78605956 = 8896^2 + 8866^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19718093 + ... + 19718100.

It is an arithmetic number, because the mean of its divisors is an integer number (46008893).

Almost surely, 2^157744772 is an apocalyptic number.

It is an amenable number.

157744772 is a deficient number, since it is larger than the sum of its proper divisors (118308586).

157744772 is a wasteful number, since it uses less digits than its factorization.

157744772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39436197 (or 39436195 counting only the distinct ones).

The product of its digits is 384160, while the sum is 44.

The square root of 157744772 is about 12559.6485619622. The cubic root of 157744772 is about 540.3207650718.

The spelling of 157744772 in words is "one hundred fifty-seven million, seven hundred forty-four thousand, seven hundred seventy-two".