15231940 has 12 divisors (see below), whose sum is σ = 31987116. Its totient is φ = 6092768.

The previous prime is 15231929. The next prime is 15231941. The reversal of 15231940 is 4913251.

15231940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9784384 + 5447556 = 3128^2 + 2334^2 .

It is not an unprimeable number, because it can be changed into a prime (15231941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380779 + ... + 380818.

It is an arithmetic number, because the mean of its divisors is an integer number (2665593).

Almost surely, 2^15231940 is an apocalyptic number.

15231940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15231940 is an abundant number, since it is smaller than the sum of its proper divisors (16755176).

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

15231940 is a wasteful number, since it uses less digits than its factorization.

15231940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761606 (or 761604 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 15231940 is about 3902.8118068900. The cubic root of 15231940 is about 247.8858519084.

The spelling of 15231940 in words is "fifteen million, two hundred thirty-one thousand, nine hundred forty".