77086512 has 40 divisors (see below), whose sum is σ = 221268080. Its totient is φ = 25695360.

The previous prime is 77086511. The next prime is 77086543. The reversal of 77086512 is 21568077.

It is a super-2 number, since 2×77086512² = 11884660664652288, which contains 22 as substring.

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 (77086511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88789 + ... + 89652.

It is an arithmetic number, because the mean of its divisors is an integer number (5531702).

Almost surely, 2^77086512 is an apocalyptic number.

77086512 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

77086512 is an abundant number, since it is smaller than the sum of its proper divisors (144181568).

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

77086512 is a wasteful number, since it uses less digits than its factorization.

77086512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178458 (or 178446 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 77086512 is about 8779.8924822574. The cubic root of 77086512 is about 425.5913557990.

The spelling of 77086512 in words is "seventy-seven million, eighty-six thousand, five hundred twelve".