77238320 has 40 divisors (see below), whose sum is σ = 183763536. Its totient is φ = 30175488.

The previous prime is 77238313. The next prime is 77238323. The reversal of 77238320 is 2383277.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (77238323) 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, 7787 + ... + 14666.

Almost surely, 2^77238320 is an apocalyptic number.

It is an amenable number.

77238320 is an abundant number, since it is smaller than the sum of its proper divisors (106525216).

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

77238320 is a wasteful number, since it uses less digits than its factorization.

77238320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22509 (or 22503 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 77238320 is about 8788.5334385209. The cubic root of 77238320 is about 425.8705477779.

It can be divided in two parts, 7 and 7238320, that added together give a palindrome (7238327).

The spelling of 77238320 in words is "seventy-seven million, two hundred thirty-eight thousand, three hundred twenty".