77874420 has 48 divisors (see below), whose sum is σ = 234823680. Its totient is φ = 19168896.

The previous prime is 77874409. The next prime is 77874463. The reversal of 77874420 is 2447877.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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, 49140 + ... + 50699.

It is an arithmetic number, because the mean of its divisors is an integer number (4892160).

Almost surely, 2^77874420 is an apocalyptic number.

It is an amenable number.

77874420 is an abundant number, since it is smaller than the sum of its proper divisors (156949260).

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

77874420 is a wasteful number, since it uses less digits than its factorization.

77874420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99864 (or 99862 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 77874420 is about 8824.6484349236. The cubic root of 77874420 is about 427.0364456530.

The spelling of 77874420 in words is "seventy-seven million, eight hundred seventy-four thousand, four hundred twenty".