772240128 has 72 divisors (see below), whose sum is σ = 2242153536. Its totient is φ = 234009600.

The previous prime is 772240103. The next prime is 772240151. The reversal of 772240128 is 821042277.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37258 + ... + 54153.

Almost surely, 2^772240128 is an apocalyptic number.

It is an amenable number.

772240128 is an abundant number, since it is smaller than the sum of its proper divisors (1469913408).

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

772240128 is a wasteful number, since it uses less digits than its factorization.

772240128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91441 (or 91427 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 772240128 is about 27789.2088408432. The cubic root of 772240128 is about 917.4536265841.

The spelling of 772240128 in words is "seven hundred seventy-two million, two hundred forty thousand, one hundred twenty-eight".