77743990 has 8 divisors (see below), whose sum is σ = 139939200. Its totient is φ = 31097592.

The previous prime is 77743973. The next prime is 77743999. The reversal of 77743990 is 9934777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×77743990² = 12088255962240200, 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 77743990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77743999) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3887190 + ... + 3887209.

It is an arithmetic number, because the mean of its divisors is an integer number (17492400).

Almost surely, 2^77743990 is an apocalyptic number.

77743990 is a deficient number, since it is larger than the sum of its proper divisors (62195210).

77743990 is a wasteful number, since it uses less digits than its factorization.

77743990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7774406.

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 77743990 is about 8817.2552418539. The cubic root of 77743990 is about 426.7979013894.

The spelling of 77743990 in words is "seventy-seven million, seven hundred forty-three thousand, nine hundred ninety".