71485990 has 16 divisors (see below), whose sum is σ = 128890080. Its totient is φ = 28546560.

The previous prime is 71485987. The next prime is 71486027. The reversal of 71485990 is 9958417.

It is a super-2 number, since 2×71485990² = 10220493532560200, which contains 22 as substring.

It is a congruent number.

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, 646 + ... + 11974.

It is an arithmetic number, because the mean of its divisors is an integer number (8055630).

Almost surely, 2^71485990 is an apocalyptic number.

71485990 is a deficient number, since it is larger than the sum of its proper divisors (57404090).

71485990 is a wasteful number, since it uses less digits than its factorization.

71485990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11967.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 71485990 is about 8454.9387933917. The cubic root of 71485990 is about 415.0244142989.

The spelling of 71485990 in words is "seventy-one million, four hundred eighty-five thousand, nine hundred ninety".