77406740 has 12 divisors (see below), whose sum is σ = 162554196. Its totient is φ = 30962688.

The previous prime is 77406739. The next prime is 77406767. The reversal of 77406740 is 4760477.

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 49168144 = 5314^2 + 7012^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77406740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935149 + ... + 1935188.

It is an arithmetic number, because the mean of its divisors is an integer number (13546183).

Almost surely, 2^77406740 is an apocalyptic number.

It is an amenable number.

77406740 is an abundant number, since it is smaller than the sum of its proper divisors (85147456).

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

77406740 is a wasteful number, since it uses less digits than its factorization.

77406740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870346 (or 3870344 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 77406740 is about 8798.1100243177. The cubic root of 77406740 is about 426.1798633609.

The spelling of 77406740 in words is "seventy-seven million, four hundred six thousand, seven hundred forty".