87405724 has 12 divisors (see below), whose sum is σ = 174811504. Its totient is φ = 37459584.

The previous prime is 87405673. The next prime is 87405737. The reversal of 87405724 is 42750478.

87405724 is an admirable number.

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, 1560789 + ... + 1560844.

Almost surely, 2^87405724 is an apocalyptic number.

It is an amenable number.

87405724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

87405724 is a wasteful number, since it uses less digits than its factorization.

87405724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121644 (or 3121642 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 87405724 is about 9349.1028446584. The cubic root of 87405724 is about 443.7924996920.

The spelling of 87405724 in words is "eighty-seven million, four hundred five thousand, seven hundred twenty-four".