76644450 has 72 divisors (see below), whose sum is σ = 207275796. Its totient is φ = 20304000.

The previous prime is 76644433. The next prime is 76644467. The reversal of 76644450 is 5444667.

76644450 is a `hidden beast` number, since 7 + 6 + 644 + 4 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (76644433) and next prime (76644467).

It can be written as a sum of positive squares in 6 ways, for example, as 9715689 + 66928761 = 3117^2 + 8181^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 80980 + ... + 81920.

Almost surely, 2^76644450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76644450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103637898).

76644450 is an abundant number, since it is smaller than the sum of its proper divisors (130631346).

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

76644450 is a wasteful number, since it uses less digits than its factorization.

76644450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 76644450 is about 8754.6816047187. The cubic root of 76644450 is about 424.7762605500.

The spelling of 76644450 in words is "seventy-six million, six hundred forty-four thousand, four hundred fifty".