71402880 has 64 divisors (see below), whose sum is σ = 227602800. Its totient is φ = 19040256.

The previous prime is 71402861. The next prime is 71402897. The reversal of 71402880 is 8820417.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675 + ... + 20514.

Almost surely, 2^71402880 is an apocalyptic number.

It is an amenable number.

71402880 is an abundant number, since it is smaller than the sum of its proper divisors (156199920).

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

71402880 is a wasteful number, since it uses less digits than its factorization.

71402880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37211 (or 37199 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 71402880 is about 8450.0224851772. The cubic root of 71402880 is about 414.8635153832.

The spelling of 71402880 in words is "seventy-one million, four hundred two thousand, eight hundred eighty".