70731312 has 20 divisors (see below), whose sum is σ = 182722680. Its totient is φ = 23577088.

The previous prime is 70731301. The next prime is 70731329. The reversal of 70731312 is 21313707.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736737 + ... + 736832.

It is an arithmetic number, because the mean of its divisors is an integer number (9136134).

Almost surely, 2^70731312 is an apocalyptic number.

It is an amenable number.

70731312 is an abundant number, since it is smaller than the sum of its proper divisors (111991368).

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

70731312 is a wasteful number, since it uses less digits than its factorization.

70731312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473580 (or 1473574 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 70731312 is about 8410.1909609711. The cubic root of 70731312 is about 413.5587728449.

It can be divided in two parts, 7073 and 1312, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 70731312 in words is "seventy million, seven hundred thirty-one thousand, three hundred twelve".