7404391679 has 32 divisors (see below), whose sum is σ = 8302089600. Its totient is φ = 6578288640.

The previous prime is 7404391669. The next prime is 7404391693. The reversal of 7404391679 is 9761934047.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7404391679 - 2⁴ = 7404391663 is a prime.

It is a super-2 number, since 2×7404391679² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7404391619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1994477 + ... + 1998185.

It is an arithmetic number, because the mean of its divisors is an integer number (259440300).

Almost surely, 2^7404391679 is an apocalyptic number.

7404391679 is a deficient number, since it is larger than the sum of its proper divisors (897697921).

7404391679 is a wasteful number, since it uses less digits than its factorization.

7404391679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 7404391679 is about 86048.7749999964. The cubic root of 7404391679 is about 1949.0805815994.

It can be divided in two parts, 740439 and 1679, that multiplied together give a square (1243197081 = 35259²).

The spelling of 7404391679 in words is "seven billion, four hundred four million, three hundred ninety-one thousand, six hundred seventy-nine".