39157974 has 48 divisors (see below), whose sum is σ = 90820080. Its totient is φ = 12156480.

The previous prime is 39157973. The next prime is 39157981. The reversal of 39157974 is 47975193.

39157974 is a `hidden beast` number, since 3 + 9 + 1 + 579 + 74 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39157973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19924 + ... + 21800.

It is an arithmetic number, because the mean of its divisors is an integer number (1892085).

Almost surely, 2^39157974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39157974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45410040).

39157974 is an abundant number, since it is smaller than the sum of its proper divisors (51662106).

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

39157974 is a wasteful number, since it uses less digits than its factorization.

39157974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1962 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 39157974 is about 6257.6332586690. The cubic root of 39157974 is about 339.5784105609.

It can be divided in two parts, 3915797 and 4, that added together give a triangular number (3915801 = T₂₇₉₈).

The spelling of 39157974 in words is "thirty-nine million, one hundred fifty-seven thousand, nine hundred seventy-four".