77421404 has 24 divisors (see below), whose sum is σ = 143095680. Its totient is φ = 36577904.

The previous prime is 77421403. The next prime is 77421413. The reversal of 77421404 is 40412477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77421403) 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, 2567 + ... + 12705.

It is an arithmetic number, because the mean of its divisors is an integer number (5962320).

Almost surely, 2^77421404 is an apocalyptic number.

It is an amenable number.

77421404 is a deficient number, since it is larger than the sum of its proper divisors (65674276).

77421404 is a wasteful number, since it uses less digits than its factorization.

77421404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249 (or 10247 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 77421404 is about 8798.9433456524. The cubic root of 77421404 is about 426.2067736227.

The spelling of 77421404 in words is "seventy-seven million, four hundred twenty-one thousand, four hundred four".