7974321090 has 64 divisors (see below), whose sum is σ = 20171721600. Its totient is φ = 2011958784.

The previous prime is 7974321083. The next prime is 7974321097. The reversal of 7974321090 is 901234797.

It is an interprime number because it is at equal distance from previous prime (7974321083) and next prime (7974321097).

It is not an unprimeable number, because it can be changed into a prime (7974321097) 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, 452484 + ... + 469776.

It is an arithmetic number, because the mean of its divisors is an integer number (315183150).

Almost surely, 2^7974321090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7974321090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10085860800).

7974321090 is an abundant number, since it is smaller than the sum of its proper divisors (12197400510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7974321090 is a wasteful number, since it uses less digits than its factorization.

7974321090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18131.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 7974321090 is about 89299.0542503111. The cubic root of 7974321090 is about 1997.8577971360.

The spelling of 7974321090 in words is "seven billion, nine hundred seventy-four million, three hundred twenty-one thousand, ninety".