732725640 has 48 divisors (see below), whose sum is σ = 2381359500. Its totient is φ = 195393408.

The previous prime is 732725599. The next prime is 732725657. The reversal of 732725640 is 46527237.

It is a happy number.

732725640 is a `hidden beast` number, since 7 + 3 + 2 + 7 + 2 + 5 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 705539844 + 27185796 = 26562^2 + 5214^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 = 732725595 and 732725604.

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, 1017315 + ... + 1018034.

Almost surely, 2^732725640 is an apocalyptic number.

It is an amenable number.

732725640 is an abundant number, since it is smaller than the sum of its proper divisors (1648633860).

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

732725640 is a wasteful number, since it uses less digits than its factorization.

732725640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035366 (or 2035359 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 732725640 is about 27068.9054082355. The cubic root of 732725640 is about 901.5305807347.

The spelling of 732725640 in words is "seven hundred thirty-two million, seven hundred twenty-five thousand, six hundred forty".