778231790 has 16 divisors (see below), whose sum is σ = 1600934112. Its totient is φ = 266822304.

The previous prime is 778231789. The next prime is 778231813. The reversal of 778231790 is 97132877.

It is a super-4 number, since 4×778231790⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

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, 5558729 + ... + 5558868.

It is an arithmetic number, because the mean of its divisors is an integer number (100058382).

Almost surely, 2^778231790 is an apocalyptic number.

778231790 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

778231790 is an abundant number, since it is smaller than the sum of its proper divisors (822702322).

778231790 is a wasteful number, since it uses less digits than its factorization.

778231790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117611.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 778231790 is about 27896.8060895867. The cubic root of 778231790 is about 919.8202980772.

The spelling of 778231790 in words is "seven hundred seventy-eight million, two hundred thirty-one thousand, seven hundred ninety".