77349870 has 64 divisors (see below), whose sum is σ = 222143040. Its totient is φ = 19039104.

The previous prime is 77349863. The next prime is 77349871. The reversal of 77349870 is 7894377.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77349871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7509 + ... + 14528.

It is an arithmetic number, because the mean of its divisors is an integer number (3470985).

Almost surely, 2^77349870 is an apocalyptic number.

77349870 is an abundant number, since it is smaller than the sum of its proper divisors (144793170).

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

77349870 is a wasteful number, since it uses less digits than its factorization.

77349870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22066 (or 22060 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 77349870 is about 8794.8774863553. The cubic root of 77349870 is about 426.0754676851.

The spelling of 77349870 in words is "seventy-seven million, three hundred forty-nine thousand, eight hundred seventy".