77488490 has 16 divisors (see below), whose sum is σ = 139601448. Its totient is φ = 30968256.

The previous prime is 77488487. The next prime is 77488529. The reversal of 77488490 is 9488477.

It can be written as a sum of positive squares in 4 ways, for example, as 73942801 + 3545689 = 8599^2 + 1883^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11864 + ... + 17196.

Almost surely, 2^77488490 is an apocalyptic number.

77488490 is a deficient number, since it is larger than the sum of its proper divisors (62112958).

77488490 is a wasteful number, since it uses less digits than its factorization.

77488490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6793.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 77488490 is about 8802.7546824843. The cubic root of 77488490 is about 426.3298414549.

The spelling of 77488490 in words is "seventy-seven million, four hundred eighty-eight thousand, four hundred ninety".