77830452 has 36 divisors (see below), whose sum is σ = 224844256. Its totient is φ = 22237200.

The previous prime is 77830427. The next prime is 77830481. The reversal of 77830452 is 25403877.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 154174 + ... + 154677.

Almost surely, 2^77830452 is an apocalyptic number.

It is an amenable number.

77830452 is an abundant number, since it is smaller than the sum of its proper divisors (147013804).

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

77830452 is a wasteful number, since it uses less digits than its factorization.

77830452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308868 (or 308863 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 77830452 is about 8822.1568791311. The cubic root of 77830452 is about 426.9560620765.

The spelling of 77830452 in words is "seventy-seven million, eight hundred thirty thousand, four hundred fifty-two".