7402400724 has 12 divisors (see below), whose sum is σ = 17272268384. Its totient is φ = 2467466904.

The previous prime is 7402400701. The next prime is 7402400737. The reversal of 7402400724 is 4270042047.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 7402400691 and 7402400700.

It is a congruent number.

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, 308433352 + ... + 308433375.

Almost surely, 2^7402400724 is an apocalyptic number.

It is an amenable number.

7402400724 is an abundant number, since it is smaller than the sum of its proper divisors (9869867660).

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

7402400724 is a wasteful number, since it uses less digits than its factorization.

7402400724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616866734 (or 616866732 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 7402400724 is about 86037.2054636830. The cubic root of 7402400724 is about 1948.9058708890.

The spelling of 7402400724 in words is "seven billion, four hundred two million, four hundred thousand, seven hundred twenty-four".