70641988 has 6 divisors (see below), whose sum is σ = 123623486. Its totient is φ = 35320992.

The previous prime is 70641983. The next prime is 70642001. The reversal of 70641988 is 88914607.

It can be written as a sum of positive squares in only one way, i.e., 44916804 + 25725184 = 6702^2 + 5072^2 .

It is not an unprimeable number, because it can be changed into a prime (70641983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8830245 + ... + 8830252.

Almost surely, 2^70641988 is an apocalyptic number.

It is an amenable number.

70641988 is a deficient number, since it is larger than the sum of its proper divisors (52981498).

70641988 is a wasteful number, since it uses less digits than its factorization.

70641988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17660501 (or 17660499 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 70641988 is about 8404.8788212561. The cubic root of 70641988 is about 413.3846100682.

The spelling of 70641988 in words is "seventy million, six hundred forty-one thousand, nine hundred eighty-eight".