77322740 has 48 divisors (see below), whose sum is σ = 177738624. Its totient is φ = 28022400.

The previous prime is 77322737. The next prime is 77322767. The reversal of 77322740 is 4722377.

77322740 = 180² + 181² + ... + 619².

It is a super-2 number, since 2×77322740² = 11957612242215200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77322697 and 77322706.

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, 122225 + ... + 122855.

It is an arithmetic number, because the mean of its divisors is an integer number (3702888).

Almost surely, 2^77322740 is an apocalyptic number.

It is an amenable number.

77322740 is an abundant number, since it is smaller than the sum of its proper divisors (100415884).

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

77322740 is a wasteful number, since it uses less digits than its factorization.

77322740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 77322740 is about 8793.3349759918. The cubic root of 77322740 is about 426.0256473938.

The spelling of 77322740 in words is "seventy-seven million, three hundred twenty-two thousand, seven hundred forty".