38002640 has 40 divisors (see below), whose sum is σ = 95155368. Its totient is φ = 14031360.

The previous prime is 38002637. The next prime is 38002651. The reversal of 38002640 is 4620083.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6012304 + 31990336 = 2452^2 + 5656^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17231 + ... + 19310.

Almost surely, 2^38002640 is an apocalyptic number.

It is an amenable number.

38002640 is an abundant number, since it is smaller than the sum of its proper divisors (57152728).

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

38002640 is a wasteful number, since it uses less digits than its factorization.

38002640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36567 (or 36561 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 38002640 is about 6164.6281315259. The cubic root of 38002640 is about 336.2053261269.

The spelling of 38002640 in words is "thirty-eight million, two thousand, six hundred forty".