77761490 has 16 divisors (see below), whose sum is σ = 147337920. Its totient is φ = 29467440.

The previous prime is 77761487. The next prime is 77761493. The reversal of 77761490 is 9416777.

It is an interprime number because it is at equal distance from previous prime (77761487) and next prime (77761493).

It is not an unprimeable number, because it can be changed into a prime (77761493) 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, 204446 + ... + 204825.

It is an arithmetic number, because the mean of its divisors is an integer number (9208620).

Almost surely, 2^77761490 is an apocalyptic number.

77761490 is a deficient number, since it is larger than the sum of its proper divisors (69576430).

77761490 is a wasteful number, since it uses less digits than its factorization.

77761490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409297.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 77761490 is about 8818.2475583304. The cubic root of 77761490 is about 426.8299227411.

The spelling of 77761490 in words is "seventy-seven million, seven hundred sixty-one thousand, four hundred ninety".