71490456 has 24 divisors (see below), whose sum is σ = 193620180. Its totient is φ = 23830128.

The previous prime is 71490451. The next prime is 71490469. The reversal of 71490456 is 65409417.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×71490456² = 10221770598175872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71490456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71490451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 496390 + ... + 496533.

Almost surely, 2^71490456 is an apocalyptic number.

It is an amenable number.

71490456 is an abundant number, since it is smaller than the sum of its proper divisors (122129724).

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

71490456 is a wasteful number, since it uses less digits than its factorization.

71490456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992935 (or 992928 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 71490456 is about 8455.2028952592. The cubic root of 71490456 is about 415.0330568336.

The spelling of 71490456 in words is "seventy-one million, four hundred ninety thousand, four hundred fifty-six".