77389450 has 24 divisors (see below), whose sum is σ = 144187200. Its totient is φ = 30903600.

The previous prime is 77389441. The next prime is 77389469. The reversal of 77389450 is 5498377.

It is a happy number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77389397 and 77389406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44701 + ... + 46399.

It is an arithmetic number, because the mean of its divisors is an integer number (6007800).

Almost surely, 2^77389450 is an apocalyptic number.

77389450 is a deficient number, since it is larger than the sum of its proper divisors (66797750).

77389450 is a wasteful number, since it uses less digits than its factorization.

77389450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622 (or 2617 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 77389450 is about 8797.1273720459. The cubic root of 77389450 is about 426.1481296964.

The spelling of 77389450 in words is "seventy-seven million, three hundred eighty-nine thousand, four hundred fifty".