7931654438 has 4 divisors (see below), whose sum is σ = 11897481660. Its totient is φ = 3965827218.

The previous prime is 7931654417. The next prime is 7931654441. The reversal of 7931654438 is 8344561397.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×7931654438² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982913608 + ... + 1982913611.

It is an arithmetic number, because the mean of its divisors is an integer number (2974370415).

Almost surely, 2^7931654438 is an apocalyptic number.

7931654438 is a deficient number, since it is larger than the sum of its proper divisors (3965827222).

7931654438 is a wasteful number, since it uses less digits than its factorization.

7931654438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965827221.

The product of its digits is 2177280, while the sum is 50.

The square root of 7931654438 is about 89059.8362787626. The cubic root of 7931654438 is about 1994.2882399269.

The spelling of 7931654438 in words is "seven billion, nine hundred thirty-one million, six hundred fifty-four thousand, four hundred thirty-eight".