77428946 has 16 divisors (see below), whose sum is σ = 133584576. Its totient is φ = 32971536.

The previous prime is 77428943. The next prime is 77428969. The reversal of 77428946 is 64982477.

It is a self number, because there is not a number n which added to its sum of digits gives 77428946.

It is not an unprimeable number, because it can be changed into a prime (77428943) 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, 15416 + ... + 19811.

It is an arithmetic number, because the mean of its divisors is an integer number (8349036).

Almost surely, 2^77428946 is an apocalyptic number.

77428946 is a deficient number, since it is larger than the sum of its proper divisors (56155630).

77428946 is a wasteful number, since it uses less digits than its factorization.

77428946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35393.

The product of its digits is 677376, while the sum is 47.

The square root of 77428946 is about 8799.3719094035. The cubic root of 77428946 is about 426.2206128064.

The spelling of 77428946 in words is "seventy-seven million, four hundred twenty-eight thousand, nine hundred forty-six".