77950512 has 140 divisors (see below), whose sum is σ = 233386104. Its totient is φ = 25194240.

The previous prime is 77950507. The next prime is 77950549. The reversal of 77950512 is 21505977.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 478143 + ... + 478305.

Almost surely, 2^77950512 is an apocalyptic number.

77950512 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 77950512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116693052).

77950512 is an abundant number, since it is smaller than the sum of its proper divisors (155435592).

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

77950512 is a wasteful number, since it uses less digits than its factorization.

77950512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 77950512 is about 8828.9587154998. The cubic root of 77950512 is about 427.1754877995.

The spelling of 77950512 in words is "seventy-seven million, nine hundred fifty thousand, five hundred twelve".