320672157 has 8 divisors (see below), whose sum is σ = 460452384. Its totient is φ = 197336688.

The previous prime is 320672147. The next prime is 320672171. The reversal of 320672157 is 751276023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-320672157 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320672147) 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, 4111143 + ... + 4111220.

It is an arithmetic number, because the mean of its divisors is an integer number (57556548).

Almost surely, 2^320672157 is an apocalyptic number.

It is an amenable number.

320672157 is a deficient number, since it is larger than the sum of its proper divisors (139780227).

320672157 is a wasteful number, since it uses less digits than its factorization.

320672157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8222379.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 320672157 is about 17907.3213239725. The cubic root of 320672157 is about 684.4689488755.

It can be divided in two parts, 3206721 and 57, that added together give a triangular number (3206778 = T₂₅₃₂).

The spelling of 320672157 in words is "three hundred twenty million, six hundred seventy-two thousand, one hundred fifty-seven".