64240776 has 40 divisors (see below), whose sum is σ = 179935470. Its totient is φ = 21413376.

The previous prime is 64240751. The next prime is 64240783. The reversal of 64240776 is 67704246.

64240776 is a `hidden beast` number, since 642 + 4 + 0 + 7 + 7 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63584676 + 656100 = 7974^2 + 810^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64240776.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48921 + ... + 50216.

Almost surely, 2^64240776 is an apocalyptic number.

It is an amenable number.

64240776 is an abundant number, since it is smaller than the sum of its proper divisors (115694694).

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

64240776 is a wasteful number, since it uses less digits than its factorization.

64240776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99155 (or 99142 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 64240776 is about 8015.0343729768. The cubic root of 64240776 is about 400.5009889299.

The spelling of 64240776 in words is "sixty-four million, two hundred forty thousand, seven hundred seventy-six".