977788340 has 36 divisors (see below), whose sum is σ = 2066903076. Its totient is φ = 388551552.

The previous prime is 977788289. The next prime is 977788349. The reversal of 977788340 is 43887779.

It can be written as a sum of positive squares in 2 ways, for example, as 152720164 + 825068176 = 12358^2 + 28724^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977788349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556904 + ... + 558656.

Almost surely, 2^977788340 is an apocalyptic number.

It is an amenable number.

977788340 is an abundant number, since it is smaller than the sum of its proper divisors (1089114736).

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

977788340 is a wasteful number, since it uses less digits than its factorization.

977788340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 53.

The square root of 977788340 is about 31269.6072888676. The cubic root of 977788340 is about 992.5406091749.

The spelling of 977788340 in words is "nine hundred seventy-seven million, seven hundred eighty-eight thousand, three hundred forty".