77440700 has 36 divisors (see below), whose sum is σ = 168942312. Its totient is φ = 30811200.

The previous prime is 77440687. The next prime is 77440703. The reversal of 77440700 is 704477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77440703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17735 + ... + 21665.

It is an arithmetic number, because the mean of its divisors is an integer number (4692842).

Almost surely, 2^77440700 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 77440700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84471156).

77440700 is an abundant number, since it is smaller than the sum of its proper divisors (91501612).

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

77440700 is a wasteful number, since it uses less digits than its factorization.

77440700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142 (or 4135 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 77440700 is about 8800.0397726374. The cubic root of 77440700 is about 426.2421790030.

The spelling of 77440700 in words is "seventy-seven million, four hundred forty thousand, seven hundred".