77880504 has 96 divisors (see below), whose sum is σ = 216130320. Its totient is φ = 23245824.

The previous prime is 77880497. The next prime is 77880511. The reversal of 77880504 is 40508877.

It is an interprime number because it is at equal distance from previous prime (77880497) and next prime (77880511).

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689152 + ... + 689264.

Almost surely, 2^77880504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77880504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108065160).

77880504 is an abundant number, since it is smaller than the sum of its proper divisors (138249816).

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

77880504 is a wasteful number, since it uses less digits than its factorization.

77880504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 77880504 is about 8824.9931444733. The cubic root of 77880504 is about 427.0475662156.

The spelling of 77880504 in words is "seventy-seven million, eight hundred eighty thousand, five hundred four".