87401582 has 4 divisors (see below), whose sum is σ = 131102376. Its totient is φ = 43700790.

The previous prime is 87401581. The next prime is 87401591. The reversal of 87401582 is 28510478.

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

It is a super-2 number, since 2×87401582² = 15278073072205448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87401581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21850394 + ... + 21850397.

It is an arithmetic number, because the mean of its divisors is an integer number (32775594).

Almost surely, 2^87401582 is an apocalyptic number.

87401582 is a deficient number, since it is larger than the sum of its proper divisors (43700794).

87401582 is a wasteful number, since it uses less digits than its factorization.

87401582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43700793.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 87401582 is about 9348.8813234526. The cubic root of 87401582 is about 443.7854894052.

The spelling of 87401582 in words is "eighty-seven million, four hundred one thousand, five hundred eighty-two".