71642264 has 8 divisors (see below), whose sum is σ = 134329260. Its totient is φ = 35821128.

The previous prime is 71642261. The next prime is 71642269. The reversal of 71642264 is 46224617.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×71642264² = 10265227982091392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71642264.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71642261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4477634 + ... + 4477649.

Almost surely, 2^71642264 is an apocalyptic number.

It is an amenable number.

71642264 is a deficient number, since it is larger than the sum of its proper divisors (62686996).

71642264 is a wasteful number, since it uses less digits than its factorization.

71642264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8955289 (or 8955285 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 71642264 is about 8464.1753289969. The cubic root of 71642264 is about 415.3266195348.

The spelling of 71642264 in words is "seventy-one million, six hundred forty-two thousand, two hundred sixty-four".