70491312 has 60 divisors (see below), whose sum is σ = 200645640. Its totient is φ = 23096064.

The previous prime is 70491307. The next prime is 70491313. The reversal of 70491312 is 21319407.

It is not an unprimeable number, because it can be changed into a prime (70491313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4348 + ... + 12644.

It is an arithmetic number, because the mean of its divisors is an integer number (3344094).

Almost surely, 2^70491312 is an apocalyptic number.

70491312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70491312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100322820).

70491312 is an abundant number, since it is smaller than the sum of its proper divisors (130154328).

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

70491312 is a wasteful number, since it uses less digits than its factorization.

70491312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8370 (or 8361 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 70491312 is about 8395.9104330620. The cubic root of 70491312 is about 413.0904909520.

The spelling of 70491312 in words is "seventy million, four hundred ninety-one thousand, three hundred twelve".