70729164 has 36 divisors (see below), whose sum is σ = 195042120. Its totient is φ = 21432960.

The previous prime is 70729159. The next prime is 70729171. The reversal of 70729164 is 46192707.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×70729164² = 10005229280277792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88909 + ... + 89700.

Almost surely, 2^70729164 is an apocalyptic number.

It is an amenable number.

70729164 is an abundant number, since it is smaller than the sum of its proper divisors (124312956).

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

70729164 is a wasteful number, since it uses less digits than its factorization.

70729164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178630 (or 178625 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 70729164 is about 8410.0632577883. The cubic root of 70729164 is about 413.5545864235.

The spelling of 70729164 in words is "seventy million, seven hundred twenty-nine thousand, one hundred sixty-four".