87963440 has 40 divisors (see below), whose sum is σ = 216548640. Its totient is φ = 33115136.

The previous prime is 87963437. The next prime is 87963451. The reversal of 87963440 is 4436978.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30980 + ... + 33699.

It is an arithmetic number, because the mean of its divisors is an integer number (5413716).

Almost surely, 2^87963440 is an apocalyptic number.

87963440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87963440 is an abundant number, since it is smaller than the sum of its proper divisors (128585200).

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

87963440 is a wasteful number, since it uses less digits than its factorization.

87963440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64709 (or 64703 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 87963440 is about 9378.8826626630. The cubic root of 87963440 is about 444.7344120724.

The spelling of 87963440 in words is "eighty-seven million, nine hundred sixty-three thousand, four hundred forty".