77476420 has 48 divisors (see below), whose sum is σ = 194035968. Its totient is φ = 25407360.

The previous prime is 77476387. The next prime is 77476423. The reversal of 77476420 is 2467477.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77476420.

It is not an unprimeable number, because it can be changed into a prime (77476423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8811 + ... + 15250.

It is an arithmetic number, because the mean of its divisors is an integer number (4042416).

Almost surely, 2^77476420 is an apocalyptic number.

77476420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77476420 is an abundant number, since it is smaller than the sum of its proper divisors (116559548).

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

77476420 is a wasteful number, since it uses less digits than its factorization.

77476420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24100 (or 24098 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 77476420 is about 8802.0690749391. The cubic root of 77476420 is about 426.3077045397.

The spelling of 77476420 in words is "seventy-seven million, four hundred seventy-six thousand, four hundred twenty".