70731812 has 12 divisors (see below), whose sum is σ = 128049180. Its totient is φ = 34146336.

The previous prime is 70731803. The next prime is 70731823. The reversal of 70731812 is 21813707.

It can be written as a sum of positive squares in 2 ways, for example, as 57365476 + 13366336 = 7574^2 + 3656^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304763 + ... + 304994.

It is an arithmetic number, because the mean of its divisors is an integer number (10670765).

Almost surely, 2^70731812 is an apocalyptic number.

It is an amenable number.

70731812 is a deficient number, since it is larger than the sum of its proper divisors (57317368).

70731812 is a wasteful number, since it uses less digits than its factorization.

70731812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609790 (or 609788 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 70731812 is about 8410.2206867597. The cubic root of 70731812 is about 413.5597473257.

The spelling of 70731812 in words is "seventy million, seven hundred thirty-one thousand, eight hundred twelve".