77479690 has 16 divisors (see below), whose sum is σ = 140819328. Its totient is φ = 30690576.

The previous prime is 77479681. The next prime is 77479691. The reversal of 77479690 is 9697477.

It is a super-2 number, since 2×77479690² = 12006204724992200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77479691) 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, 36582 + ... + 38641.

It is an arithmetic number, because the mean of its divisors is an integer number (8801208).

Almost surely, 2^77479690 is an apocalyptic number.

77479690 is a deficient number, since it is larger than the sum of its proper divisors (63339638).

77479690 is a wasteful number, since it uses less digits than its factorization.

77479690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75333.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 77479690 is about 8802.2548247594. The cubic root of 77479690 is about 426.3137020918.

The spelling of 77479690 in words is "seventy-seven million, four hundred seventy-nine thousand, six hundred ninety".