77719942 has 32 divisors (see below), whose sum is σ = 124454880. Its totient is φ = 36341760.

The previous prime is 77719927. The next prime is 77719973. The reversal of 77719942 is 24991777.

It is a junction number, because it is equal to n+sod(n) for n = 77719892 and 77719901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402598 + ... + 402790.

It is an arithmetic number, because the mean of its divisors is an integer number (3889215).

Almost surely, 2^77719942 is an apocalyptic number.

77719942 is a deficient number, since it is larger than the sum of its proper divisors (46734938).

77719942 is a wasteful number, since it uses less digits than its factorization.

77719942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408.

The product of its digits is 222264, while the sum is 46.

The square root of 77719942 is about 8815.8914467001. The cubic root of 77719942 is about 426.7538907232.

The spelling of 77719942 in words is "seventy-seven million, seven hundred nineteen thousand, nine hundred forty-two".