37979640 has 48 divisors (see below), whose sum is σ = 123435000. Its totient is φ = 10127808.

The previous prime is 37979629. The next prime is 37979677. The reversal of 37979640 is 4697973.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52390 + ... + 53109.

Almost surely, 2^37979640 is an apocalyptic number.

37979640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

37979640 is an abundant number, since it is smaller than the sum of its proper divisors (85455360).

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

37979640 is a wasteful number, since it uses less digits than its factorization.

37979640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105516 (or 105509 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 37979640 is about 6162.7623676400. The cubic root of 37979640 is about 336.1374862520.

The spelling of 37979640 in words is "thirty-seven million, nine hundred seventy-nine thousand, six hundred forty".