39420040 has 32 divisors (see below), whose sum is σ = 96759360. Its totient is φ = 14334400.

The previous prime is 39420023. The next prime is 39420049. The reversal of 39420040 is 4002493.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 39419993 and 39420020.

It is not an unprimeable number, because it can be changed into a prime (39420049) 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, 44356 + ... + 45235.

It is an arithmetic number, because the mean of its divisors is an integer number (3023730).

Almost surely, 2^39420040 is an apocalyptic number.

It is an amenable number.

39420040 is an abundant number, since it is smaller than the sum of its proper divisors (57339320).

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

39420040 is a wasteful number, since it uses less digits than its factorization.

39420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89613 (or 89609 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 39420040 is about 6278.5380463926. The cubic root of 39420040 is about 340.3342733253.

The spelling of 39420040 in words is "thirty-nine million, four hundred twenty thousand, forty".