87405012 has 36 divisors (see below), whose sum is σ = 221588640. Its totient is φ = 29049552.

The previous prime is 87405011. The next prime is 87405013. The reversal of 87405012 is 21050478.

It is an interprime number because it is at equal distance from previous prime (87405011) and next prime (87405013).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×87405012² = 15279272245440288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87405011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9543 + ... + 16305.

It is an arithmetic number, because the mean of its divisors is an integer number (6155240).

Almost surely, 2^87405012 is an apocalyptic number.

It is an amenable number.

87405012 is an abundant number, since it is smaller than the sum of its proper divisors (134183628).

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

87405012 is a wasteful number, since it uses less digits than its factorization.

87405012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132 (or 7127 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 87405012 is about 9349.0647660608. The cubic root of 87405012 is about 443.7912946560.

The spelling of 87405012 in words is "eighty-seven million, four hundred five thousand, twelve".