77772046 has 16 divisors (see below), whose sum is σ = 127456560. Its totient is φ = 35297280.

The previous prime is 77772017. The next prime is 77772047. The reversal of 77772046 is 64027777.

It is a super-2 number, since 2×77772046² = 12096982278052232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77772047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14620 + ... + 19216.

It is an arithmetic number, because the mean of its divisors is an integer number (7966035).

Almost surely, 2^77772046 is an apocalyptic number.

77772046 is a deficient number, since it is larger than the sum of its proper divisors (49684514).

77772046 is a wasteful number, since it uses less digits than its factorization.

77772046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379.

The product of its (nonzero) digits is 115248, while the sum is 40.

The square root of 77772046 is about 8818.8460696397. The cubic root of 77772046 is about 426.8492356975.

The spelling of 77772046 in words is "seventy-seven million, seven hundred seventy-two thousand, forty-six".