87999426 has 32 divisors (see below), whose sum is σ = 204059520. Its totient is φ = 28057392.

The previous prime is 87999419. The next prime is 87999437. The reversal of 87999426 is 62499978.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34185 + ... + 36668.

It is an arithmetic number, because the mean of its divisors is an integer number (6376860).

Almost surely, 2^87999426 is an apocalyptic number.

87999426 is an abundant number, since it is smaller than the sum of its proper divisors (116060094).

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

87999426 is a wasteful number, since it uses less digits than its factorization.

87999426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70887 (or 70881 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 87999426 is about 9380.8009252942. The cubic root of 87999426 is about 444.7950510174.

It can be divided in two parts, 8799 and 9426, that added together give a square (18225 = 135²).

The spelling of 87999426 in words is "eighty-seven million, nine hundred ninety-nine thousand, four hundred twenty-six".