70831988 has 6 divisors (see below), whose sum is σ = 123955986. Its totient is φ = 35415992.

The previous prime is 70831939. The next prime is 70831991. The reversal of 70831988 is 88913807.

It can be written as a sum of positive squares in only one way, i.e., 63552784 + 7279204 = 7972^2 + 2698^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8853995 + ... + 8854002.

It is an arithmetic number, because the mean of its divisors is an integer number (20659331).

Almost surely, 2^70831988 is an apocalyptic number.

It is an amenable number.

70831988 is a deficient number, since it is larger than the sum of its proper divisors (53123998).

70831988 is a wasteful number, since it uses less digits than its factorization.

70831988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17708001 (or 17707999 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 70831988 is about 8416.1741902126. The cubic root of 70831988 is about 413.7548939281.

The spelling of 70831988 in words is "seventy million, eight hundred thirty-one thousand, nine hundred eighty-eight".