77791452 has 12 divisors (see below), whose sum is σ = 181513416. Its totient is φ = 25930480.

The previous prime is 77791433. The next prime is 77791457. The reversal of 77791452 is 25419777.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77791457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3241299 + ... + 3241322.

It is an arithmetic number, because the mean of its divisors is an integer number (15126118).

Almost surely, 2^77791452 is an apocalyptic number.

It is an amenable number.

77791452 is an abundant number, since it is smaller than the sum of its proper divisors (103721964).

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

77791452 is a wasteful number, since it uses less digits than its factorization.

77791452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6482628 (or 6482626 counting only the distinct ones).

The product of its digits is 123480, while the sum is 42.

The square root of 77791452 is about 8819.9462583397. The cubic root of 77791452 is about 426.8847358025.

It can be divided in two parts, 777 and 91452, that added together give a palindrome (92229).

The spelling of 77791452 in words is "seventy-seven million, seven hundred ninety-one thousand, four hundred fifty-two".