770136978 has 32 divisors (see below), whose sum is σ = 1661075136. Its totient is φ = 236634048.

The previous prime is 770136973. The next prime is 770136979. The reversal of 770136978 is 879631077.

It is a happy number.

It is a super-2 number, since 2×770136978² = 1186221929765944968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (770136973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52525 + ... + 65567.

It is an arithmetic number, because the mean of its divisors is an integer number (51908598).

Almost surely, 2^770136978 is an apocalyptic number.

770136978 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

770136978 is an abundant number, since it is smaller than the sum of its proper divisors (890938158).

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

770136978 is a wasteful number, since it uses less digits than its factorization.

770136978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818.

The product of its (nonzero) digits is 444528, while the sum is 48.

The square root of 770136978 is about 27751.3419135003. The cubic root of 770136978 is about 916.6199925693.

The spelling of 770136978 in words is "seven hundred seventy million, one hundred thirty-six thousand, nine hundred seventy-eight".