775642972 has 24 divisors (see below), whose sum is σ = 1463534352. Its totient is φ = 357561600.

The previous prime is 775642949. The next prime is 775642991. The reversal of 775642972 is 279246577.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37347 + ... + 54277.

It is an arithmetic number, because the mean of its divisors is an integer number (60980598).

Almost surely, 2^775642972 is an apocalyptic number.

It is an amenable number.

775642972 is a deficient number, since it is larger than the sum of its proper divisors (687891380).

775642972 is a wasteful number, since it uses less digits than its factorization.

775642972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17829 (or 17827 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

The square root of 775642972 is about 27850.3675379698. The cubic root of 775642972 is about 918.7992258198.

The spelling of 775642972 in words is "seven hundred seventy-five million, six hundred forty-two thousand, nine hundred seventy-two".