77863490 has 16 divisors (see below), whose sum is σ = 143137152. Its totient is φ = 30482544.

The previous prime is 77863483. The next prime is 77863493. The reversal of 77863490 is 9436877.

It is not an unprimeable number, because it can be changed into a prime (77863493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82364 + ... + 83303.

It is an arithmetic number, because the mean of its divisors is an integer number (8946072).

Almost surely, 2^77863490 is an apocalyptic number.

77863490 is a deficient number, since it is larger than the sum of its proper divisors (65273662).

77863490 is a wasteful number, since it uses less digits than its factorization.

77863490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165721.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 77863490 is about 8824.0291250653. The cubic root of 77863490 is about 427.0164659355.

The spelling of 77863490 in words is "seventy-seven million, eight hundred sixty-three thousand, four hundred ninety".