77400344 has 32 divisors (see below), whose sum is σ = 169720320. Its totient is φ = 32399136.

The previous prime is 77400341. The next prime is 77400409. The reversal of 77400344 is 44300477.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77400341) 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, 13664 + ... + 18479.

It is an arithmetic number, because the mean of its divisors is an integer number (5303760).

Almost surely, 2^77400344 is an apocalyptic number.

It is an amenable number.

77400344 is an abundant number, since it is smaller than the sum of its proper divisors (92319976).

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

77400344 is a wasteful number, since it uses less digits than its factorization.

77400344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32199 (or 32195 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 77400344 is about 8797.7465296518. The cubic root of 77400344 is about 426.1681248418.

It can be divided in two parts, 77400 and 344, that multiplied together give a square (26625600 = 5160²).

The spelling of 77400344 in words is "seventy-seven million, four hundred thousand, three hundred forty-four".