39970440 has 48 divisors (see below), whose sum is σ = 129905100. Its totient is φ = 10658688.

The previous prime is 39970421. The next prime is 39970453. The reversal of 39970440 is 4407993.

It can be written as a sum of positive squares in 2 ways, for example, as 35784324 + 4186116 = 5982^2 + 2046^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 39970395 and 39970404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55155 + ... + 55874.

Almost surely, 2^39970440 is an apocalyptic number.

39970440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39970440 is an abundant number, since it is smaller than the sum of its proper divisors (89934660).

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

39970440 is a wasteful number, since it uses less digits than its factorization.

39970440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111046 (or 111039 counting only the distinct ones).

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

The square root of 39970440 is about 6322.2179652397. The cubic root of 39970440 is about 341.9109237595.

The spelling of 39970440 in words is "thirty-nine million, nine hundred seventy thousand, four hundred forty".