39699690 has 16 divisors (see below), whose sum is σ = 95279328. Its totient is φ = 10586576.

The previous prime is 39699661. The next prime is 39699691. The reversal of 39699690 is 9699693.

It is a super-2 number, since 2×39699690² = 3152130772192200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39699691) 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, 661632 + ... + 661691.

It is an arithmetic number, because the mean of its divisors is an integer number (5954958).

Almost surely, 2^39699690 is an apocalyptic number.

39699690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39699690 is an abundant number, since it is smaller than the sum of its proper divisors (55579638).

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

39699690 is a wasteful number, since it uses less digits than its factorization.

39699690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323333.

The product of its (nonzero) digits is 708588, while the sum is 51.

The square root of 39699690 is about 6300.7690006856. The cubic root of 39699690 is about 341.1371670061.

The spelling of 39699690 in words is "thirty-nine million, six hundred ninety-nine thousand, six hundred ninety".