77490394 has 16 divisors (see below), whose sum is σ = 118437120. Its totient is φ = 38016720.

The previous prime is 77490319. The next prime is 77490461. The reversal of 77490394 is 49309477.

It is a happy number.

It is a super-2 number, since 2×77490394² = 12009522324550472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77490394.

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, 31327 + ... + 33709.

It is an arithmetic number, because the mean of its divisors is an integer number (7402320).

Almost surely, 2^77490394 is an apocalyptic number.

77490394 is a deficient number, since it is larger than the sum of its proper divisors (40946726).

77490394 is a wasteful number, since it uses less digits than its factorization.

77490394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 77490394 is about 8802.8628297844. The cubic root of 77490394 is about 426.3333332654. Note that the first 6 decimals are identical.

The spelling of 77490394 in words is "seventy-seven million, four hundred ninety thousand, three hundred ninety-four".