78532650 has 144 divisors (see below), whose sum is σ = 244430784. Its totient is φ = 17706240.

The previous prime is 78532633. The next prime is 78532661. The reversal of 78532650 is 5623587.

78532650 is a `hidden beast` number, since 78 + 532 + 6 + 50 = 666.

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 71 ways as a sum of consecutive naturals, for example, 336934 + ... + 337166.

It is an arithmetic number, because the mean of its divisors is an integer number (1697436).

Almost surely, 2^78532650 is an apocalyptic number.

78532650 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78532650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122215392).

78532650 is an abundant number, since it is smaller than the sum of its proper divisors (165898134).

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

78532650 is a wasteful number, since it uses less digits than its factorization.

78532650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 78532650 is about 8861.8649278806. The cubic root of 78532650 is about 428.2362402965.

The spelling of 78532650 in words is "seventy-eight million, five hundred thirty-two thousand, six hundred fifty".