39121040 has 40 divisors (see below), whose sum is σ = 103951680. Its totient is φ = 13412736.

The previous prime is 39121031. The next prime is 39121051. The reversal of 39121040 is 4012193.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 34370 + ... + 35489.

It is an arithmetic number, because the mean of its divisors is an integer number (2598792).

Almost surely, 2^39121040 is an apocalyptic number.

It is an amenable number.

39121040 is an abundant number, since it is smaller than the sum of its proper divisors (64830640).

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

39121040 is a wasteful number, since it uses less digits than its factorization.

39121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69879 (or 69873 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 39121040 is about 6254.6814467245. The cubic root of 39121040 is about 339.4716129492.

The spelling of 39121040 in words is "thirty-nine million, one hundred twenty-one thousand, forty".