39728490 has 32 divisors (see below), whose sum is σ = 100958400. Its totient is φ = 9970944.

The previous prime is 39728483. The next prime is 39728497. The reversal of 39728490 is 9482793.

It is an interprime number because it is at equal distance from previous prime (39728483) and next prime (39728497).

It is not an unprimeable number, because it can be changed into a prime (39728497) 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, 38440 + ... + 39459.

It is an arithmetic number, because the mean of its divisors is an integer number (3154950).

Almost surely, 2^39728490 is an apocalyptic number.

39728490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39728490 is an abundant number, since it is smaller than the sum of its proper divisors (61229910).

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

39728490 is a wasteful number, since it uses less digits than its factorization.

39728490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77926.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 39728490 is about 6303.0540216628. The cubic root of 39728490 is about 341.2196393175.

The spelling of 39728490 in words is "thirty-nine million, seven hundred twenty-eight thousand, four hundred ninety".