70388428 has 24 divisors (see below), whose sum is σ = 134671824. Its totient is φ = 31924800.

The previous prime is 70388419. The next prime is 70388429. The reversal of 70388428 is 82488307.

It is a super-2 number, since 2×70388428² = 9909061592622368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70388429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22326 + ... + 25282.

It is an arithmetic number, because the mean of its divisors is an integer number (5611326).

Almost surely, 2^70388428 is an apocalyptic number.

It is an amenable number.

70388428 is a deficient number, since it is larger than the sum of its proper divisors (64283396).

70388428 is a wasteful number, since it uses less digits than its factorization.

70388428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513 (or 3511 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 70388428 is about 8389.7811652033. The cubic root of 70388428 is about 412.8894208036.

The spelling of 70388428 in words is "seventy million, three hundred eighty-eight thousand, four hundred twenty-eight".