3640400272 has 20 divisors (see below), whose sum is σ = 7096552240. Its totient is φ = 1809031968.

The previous prime is 3640400251. The next prime is 3640400299. The reversal of 3640400272 is 2720040463.

It is a super-3 number, since 3×3640400272³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3640400272.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695322 + ... + 700537.

It is an arithmetic number, because the mean of its divisors is an integer number (354827612).

Almost surely, 2^3640400272 is an apocalyptic number.

It is an amenable number.

3640400272 is a deficient number, since it is larger than the sum of its proper divisors (3456151968).

3640400272 is a wasteful number, since it uses less digits than its factorization.

3640400272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396030 (or 1396024 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 3640400272 is about 60335.7296467027. The cubic root of 3640400272 is about 1538.3307194908.

The spelling of 3640400272 in words is "three billion, six hundred forty million, four hundred thousand, two hundred seventy-two".