77670474 has 64 divisors (see below), whose sum is σ = 184092672. Its totient is φ = 21384000.

The previous prime is 77670443. The next prime is 77670479. The reversal of 77670474 is 47407677.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (77670479) 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, 234489 + ... + 234819.

It is an arithmetic number, because the mean of its divisors is an integer number (2876448).

Almost surely, 2^77670474 is an apocalyptic number.

77670474 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 77670474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92046336).

77670474 is an abundant number, since it is smaller than the sum of its proper divisors (106422198).

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

77670474 is a wasteful number, since it uses less digits than its factorization.

77670474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531.

The product of its (nonzero) digits is 230496, while the sum is 42.

The square root of 77670474 is about 8813.0853848127. The cubic root of 77670474 is about 426.6633299164.

The spelling of 77670474 in words is "seventy-seven million, six hundred seventy thousand, four hundred seventy-four".