39497920 has 168 divisors, whose sum is σ = 119877840. Its totient is φ = 12257280.

The previous prime is 39497911. The next prime is 39497929. The reversal of 39497920 is 2979493.

It is an interprime number because it is at equal distance from previous prime (39497911) and next prime (39497929).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39497929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172366 + ... + 172594.

Almost surely, 2^39497920 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 39497920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59938920).

39497920 is an abundant number, since it is smaller than the sum of its proper divisors (80379920).

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

39497920 is a wasteful number, since it uses less digits than its factorization.

39497920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 39497920 is about 6284.7370668947. The cubic root of 39497920 is about 340.5582524432.

The spelling of 39497920 in words is "thirty-nine million, four hundred ninety-seven thousand, nine hundred twenty".