77493944 has 64 divisors (see below), whose sum is σ = 163814400. Its totient is φ = 34070400.

The previous prime is 77493919. The next prime is 77493959. The reversal of 77493944 is 44939477.

It is a super-2 number, since 2×77493944² = 12010622713350272, which contains 22 as substring.

Its product of digits (762048) is a multiple of the sum of its prime factors (324).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493514 + ... + 493670.

It is an arithmetic number, because the mean of its divisors is an integer number (2559600).

Almost surely, 2^77493944 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 77493944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81907200).

77493944 is an abundant number, since it is smaller than the sum of its proper divisors (86320456).

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

77493944 is a wasteful number, since it uses less digits than its factorization.

77493944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 320 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 77493944 is about 8803.0644664230. The cubic root of 77493944 is about 426.3398435787.

The spelling of 77493944 in words is "seventy-seven million, four hundred ninety-three thousand, nine hundred forty-four".