778820152 has 32 divisors (see below), whose sum is σ = 1605225600. Its totient is φ = 351301600.

The previous prime is 778820149. The next prime is 778820153. The reversal of 778820152 is 251028877.

It is a super-2 number, since 2×778820152² = 1213121658322606208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778820153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22252 + ... + 45307.

It is an arithmetic number, because the mean of its divisors is an integer number (50163300).

Almost surely, 2^778820152 is an apocalyptic number.

It is an amenable number.

778820152 is an abundant number, since it is smaller than the sum of its proper divisors (826405448).

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

778820152 is a wasteful number, since it uses less digits than its factorization.

778820152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67707 (or 67703 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 778820152 is about 27907.3494262712. The cubic root of 778820152 is about 920.0520417946.

The spelling of 778820152 in words is "seven hundred seventy-eight million, eight hundred twenty thousand, one hundred fifty-two".