70621988 has 12 divisors (see below), whose sum is σ = 123649932. Its totient is φ = 35293440.

The previous prime is 70621963. The next prime is 70622017. The reversal of 70621988 is 88912607.

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 68525284 = 1448^2 + 8278^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9656 + ... + 15312.

It is an arithmetic number, because the mean of its divisors is an integer number (10304161).

Almost surely, 2^70621988 is an apocalyptic number.

It is an amenable number.

70621988 is a deficient number, since it is larger than the sum of its proper divisors (53027944).

70621988 is a wasteful number, since it uses less digits than its factorization.

70621988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782 (or 8780 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 70621988 is about 8403.6889518830. The cubic root of 70621988 is about 413.3455942137.

The spelling of 70621988 in words is "seventy million, six hundred twenty-one thousand, nine hundred eighty-eight".