70639000 has 32 divisors (see below), whose sum is σ = 165297600. Its totient is φ = 28255200.

The previous prime is 70638991. The next prime is 70639001. The reversal of 70639000 is 93607.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70639001) 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, 34320 + ... + 36319.

It is an arithmetic number, because the mean of its divisors is an integer number (5165550).

Almost surely, 2^70639000 is an apocalyptic number.

It is an amenable number.

70639000 is an abundant number, since it is smaller than the sum of its proper divisors (94658600).

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

70639000 is a wasteful number, since it uses less digits than its factorization.

70639000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70660 (or 70646 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 70639000 is about 8404.7010654752. The cubic root of 70639000 is about 413.3787815675.

The spelling of 70639000 in words is "seventy million, six hundred thirty-nine thousand".