77401406 has 8 divisors (see below), whose sum is σ = 120105720. Its totient is φ = 37366168.

The previous prime is 77401367. The next prime is 77401427. The reversal of 77401406 is 60410477.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 667196 + ... + 667311.

It is an arithmetic number, because the mean of its divisors is an integer number (15013215).

Almost surely, 2^77401406 is an apocalyptic number.

77401406 is a deficient number, since it is larger than the sum of its proper divisors (42704314).

77401406 is a wasteful number, since it uses less digits than its factorization.

77401406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334538.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 77401406 is about 8797.8068858097. The cubic root of 77401406 is about 426.1700739652.

The spelling of 77401406 in words is "seventy-seven million, four hundred one thousand, four hundred six".