39690540 has 96 divisors (see below), whose sum is σ = 127518720. Its totient is φ = 10238400.

The previous prime is 39690533. The next prime is 39690569. The reversal of 39690540 is 4509693.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 39690495 and 39690504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15555 + ... + 17925.

It is an arithmetic number, because the mean of its divisors is an integer number (1328320).

Almost surely, 2^39690540 is an apocalyptic number.

39690540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39690540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63759360).

39690540 is an abundant number, since it is smaller than the sum of its proper divisors (87828180).

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

39690540 is a wasteful number, since it uses less digits than its factorization.

39690540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 39690540 is about 6300.0428569971. The cubic root of 39690540 is about 341.1109565166.

The spelling of 39690540 in words is "thirty-nine million, six hundred ninety thousand, five hundred forty".