15723232340 has 48 divisors (see below), whose sum is σ = 34972115472. Its totient is φ = 5917464576.

The previous prime is 15723232339. The next prime is 15723232361. The reversal of 15723232340 is 4323232751.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1103036944 + 14620195396 = 33212^2 + 120914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15723232297 and 15723232306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1571594 + ... + 1581566.

It is an arithmetic number, because the mean of its divisors is an integer number (728585739).

Almost surely, 2^15723232340 is an apocalyptic number.

15723232340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15723232340 is an abundant number, since it is smaller than the sum of its proper divisors (19248883132).

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

15723232340 is a wasteful number, since it uses less digits than its factorization.

15723232340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14636 (or 14634 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The spelling of 15723232340 in words is "fifteen billion, seven hundred twenty-three million, two hundred thirty-two thousand, three hundred forty".