76644834 has 96 divisors (see below), whose sum is σ = 190181376. Its totient is φ = 20139840.

The previous prime is 76644833. The next prime is 76644839. The reversal of 76644834 is 43844667.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76644833) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1782417 + ... + 1782459.

It is an arithmetic number, because the mean of its divisors is an integer number (1981056).

Almost surely, 2^76644834 is an apocalyptic number.

76644834 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 76644834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95090688).

76644834 is an abundant number, since it is smaller than the sum of its proper divisors (113536542).

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

76644834 is a wasteful number, since it uses less digits than its factorization.

76644834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 123 counting only the distinct ones).

The product of its digits is 387072, while the sum is 42.

The square root of 76644834 is about 8754.7035358143. The cubic root of 76644834 is about 424.7769699461.

The spelling of 76644834 in words is "seventy-six million, six hundred forty-four thousand, eight hundred thirty-four".