70887312 has 100 divisors (see below), whose sum is σ = 207955440. Its totient is φ = 23308992.

The previous prime is 70887293. The next prime is 70887317. The reversal of 70887312 is 21378807.

It is a super-2 number, since 2×70887312² = 10050022005170688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (70887317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 107239 + ... + 107897.

Almost surely, 2^70887312 is an apocalyptic number.

70887312 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 70887312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103977720).

70887312 is an abundant number, since it is smaller than the sum of its proper divisors (137068128).

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

70887312 is a wasteful number, since it uses less digits than its factorization.

70887312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 70887312 is about 8419.4603152459. The cubic root of 70887312 is about 413.8625882968.

It can be divided in two parts, 7088 and 7312, that added together give a square (14400 = 120²).

The spelling of 70887312 in words is "seventy million, eight hundred eighty-seven thousand, three hundred twelve".