77449398 has 16 divisors (see below), whose sum is σ = 166814256. Its totient is φ = 23830560.

The previous prime is 77449397. The next prime is 77449481. The reversal of 77449398 is 89394477.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77449398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77449391) 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, 496393 + ... + 496548.

It is an arithmetic number, because the mean of its divisors is an integer number (10425891).

Almost surely, 2^77449398 is an apocalyptic number.

77449398 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

77449398 is an abundant number, since it is smaller than the sum of its proper divisors (89364858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77449398 is a wasteful number, since it uses less digits than its factorization.

77449398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992959.

The product of its digits is 1524096, while the sum is 51.

The square root of 77449398 is about 8800.5339610730. The cubic root of 77449398 is about 426.2581366569.

The spelling of 77449398 in words is "seventy-seven million, four hundred forty-nine thousand, three hundred ninety-eight".