87285904402 has 4 divisors (see below), whose sum is σ = 130928856606. Its totient is φ = 43642952200.

The previous prime is 87285904369. The next prime is 87285904423. The reversal of 87285904402 is 20440958278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75900801001 + 11385103401 = 275501^2 + 106701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21821476099 + ... + 21821476102.

Almost surely, 2^87285904402 is an apocalyptic number.

87285904402 is a deficient number, since it is larger than the sum of its proper divisors (43642952204).

87285904402 is a wasteful number, since it uses less digits than its factorization.

87285904402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43642952203.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 87285904402 in words is "eighty-seven billion, two hundred eighty-five million, nine hundred four thousand, four hundred two".