70642028 has 48 divisors (see below), whose sum is σ = 133425600. Its totient is φ = 32659200.

The previous prime is 70642009. The next prime is 70642031. The reversal of 70642028 is 82024607.

It is a super-2 number, since 2×70642028² = 9980592239905568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467753 + ... + 467903.

It is an arithmetic number, because the mean of its divisors is an integer number (2779700).

Almost surely, 2^70642028 is an apocalyptic number.

It is an amenable number.

70642028 is a deficient number, since it is larger than the sum of its proper divisors (62783572).

70642028 is a wasteful number, since it uses less digits than its factorization.

70642028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 70642028 is about 8404.8812008261. The cubic root of 70642028 is about 413.3846880925.

The spelling of 70642028 in words is "seventy million, six hundred forty-two thousand, twenty-eight".