39157540 has 48 divisors (see below), whose sum is σ = 85765680. Its totient is φ = 14999040.

The previous prime is 39157463. The next prime is 39157541. The reversal of 39157540 is 4575193.

It can be written as a sum of positive squares in 8 ways, for example, as 5308416 + 33849124 = 2304^2 + 5818^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39157496 and 39157505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39157541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104794 + ... + 105166.

It is an arithmetic number, because the mean of its divisors is an integer number (1786785).

Almost surely, 2^39157540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39157540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42882840).

39157540 is an abundant number, since it is smaller than the sum of its proper divisors (46608140).

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

39157540 is a wasteful number, since it uses less digits than its factorization.

39157540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 39157540 is about 6257.5985809254. The cubic root of 39157540 is about 339.5771560052.

The spelling of 39157540 in words is "thirty-nine million, one hundred fifty-seven thousand, five hundred forty".