70139772 has 18 divisors (see below), whose sum is σ = 177297848. Its totient is φ = 23379912.

The previous prime is 70139759. The next prime is 70139779. The reversal of 70139772 is 27793107.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1948327 = 70139772 / (7 + 0 + 1 + 3 + 9 + 7 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70139779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 974128 + ... + 974199.

Almost surely, 2^70139772 is an apocalyptic number.

It is an amenable number.

70139772 is an abundant number, since it is smaller than the sum of its proper divisors (107158076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70139772 is a wasteful number, since it uses less digits than its factorization.

70139772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948337 (or 1948332 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 70139772 is about 8374.9490744720. The cubic root of 70139772 is about 412.4026525105.

The spelling of 70139772 in words is "seventy million, one hundred thirty-nine thousand, seven hundred seventy-two".