39404970 has 96 divisors (see below), whose sum is σ = 114027264. Its totient is φ = 9360000.

The previous prime is 39404927. The next prime is 39404983. The reversal of 39404970 is 7940493.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52095 + ... + 52845.

It is an arithmetic number, because the mean of its divisors is an integer number (1187784).

Almost surely, 2^39404970 is an apocalyptic number.

39404970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39404970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57013632).

39404970 is an abundant number, since it is smaller than the sum of its proper divisors (74622294).

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

39404970 is a wasteful number, since it uses less digits than its factorization.

39404970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 39404970 is about 6277.3378115249. The cubic root of 39404970 is about 340.2908986762.

The spelling of 39404970 in words is "thirty-nine million, four hundred four thousand, nine hundred seventy".