77488340 has 12 divisors (see below), whose sum is σ = 162725556. Its totient is φ = 30995328.

The previous prime is 77488339. The next prime is 77488349. The reversal of 77488340 is 4388477.

It can be written as a sum of positive squares in 2 ways, for example, as 22905796 + 54582544 = 4786^2 + 7388^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77488349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1937189 + ... + 1937228.

It is an arithmetic number, because the mean of its divisors is an integer number (13560463).

Almost surely, 2^77488340 is an apocalyptic number.

It is an amenable number.

77488340 is an abundant number, since it is smaller than the sum of its proper divisors (85237216).

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

77488340 is a wasteful number, since it uses less digits than its factorization.

77488340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874426 (or 3874424 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

The square root of 77488340 is about 8802.7461624200. The cubic root of 77488340 is about 426.3295663624.

The spelling of 77488340 in words is "seventy-seven million, four hundred eighty-eight thousand, three hundred forty".