77748490 has 8 divisors (see below), whose sum is σ = 139947300. Its totient is φ = 31099392.

The previous prime is 77748469. The next prime is 77748491. The reversal of 77748490 is 9484777.

It can be written as a sum of positive squares in 2 ways, for example, as 65561409 + 12187081 = 8097^2 + 3491^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 77748490.

It is not an unprimeable number, because it can be changed into a prime (77748491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3887415 + ... + 3887434.

Almost surely, 2^77748490 is an apocalyptic number.

77748490 is a deficient number, since it is larger than the sum of its proper divisors (62198810).

77748490 is a wasteful number, since it uses less digits than its factorization.

77748490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7774856.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 77748490 is about 8817.5104196139. The cubic root of 77748490 is about 426.8061359102.

The spelling of 77748490 in words is "seventy-seven million, seven hundred forty-eight thousand, four hundred ninety".