77747004 has 18 divisors (see below), whose sum is σ = 196527240. Its totient is φ = 25915656.

The previous prime is 77747003. The next prime is 77747023. The reversal of 77747004 is 40074777.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2159639 = 77747004 / (7 + 7 + 7 + 4 + 7 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 77747004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77747003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1079784 + ... + 1079855.

It is an arithmetic number, because the mean of its divisors is an integer number (10918180).

Almost surely, 2^77747004 is an apocalyptic number.

It is an amenable number.

77747004 is an abundant number, since it is smaller than the sum of its proper divisors (118780236).

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

77747004 is a wasteful number, since it uses less digits than its factorization.

77747004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159649 (or 2159644 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 77747004 is about 8817.4261550636. The cubic root of 77747004 is about 426.8034167236.

The spelling of 77747004 in words is "seventy-seven million, seven hundred forty-seven thousand, four".