78774872 has 48 divisors (see below), whose sum is σ = 171937080. Its totient is φ = 33693440.

The previous prime is 78774847. The next prime is 78774881. The reversal of 78774872 is 27847787.

78774872 = T₄₅₃ + T₄₅₄ + ... + T₈₂₆.

It is a self number, because there is not a number n which added to its sum of digits gives 78774872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14063 + ... + 18849.

Almost surely, 2^78774872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78774872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85968540).

78774872 is an abundant number, since it is smaller than the sum of its proper divisors (93162208).

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

78774872 is a wasteful number, since it uses less digits than its factorization.

78774872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4832 (or 4817 counting only the distinct ones).

The product of its digits is 1229312, while the sum is 50.

The square root of 78774872 is about 8875.5209424574. The cubic root of 78774872 is about 428.6760649058.

The spelling of 78774872 in words is "seventy-eight million, seven hundred seventy-four thousand, eight hundred seventy-two".