77449990 has 16 divisors (see below), whose sum is σ = 141491952. Its totient is φ = 30517344.

The previous prime is 77449979. The next prime is 77450003. The reversal of 77449990 is 9994477.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57129 + ... + 58468.

It is an arithmetic number, because the mean of its divisors is an integer number (8843247).

Almost surely, 2^77449990 is an apocalyptic number.

77449990 is a deficient number, since it is larger than the sum of its proper divisors (64041962).

77449990 is a wasteful number, since it uses less digits than its factorization.

77449990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115671.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 77449990 is about 8800.5675953316. The cubic root of 77449990 is about 426.2592227173.

The spelling of 77449990 in words is "seventy-seven million, four hundred forty-nine thousand, nine hundred ninety".