15143940 has 216 divisors, whose sum is σ = 57139992. Its totient is φ = 3225600.

The previous prime is 15143927. The next prime is 15143971. The reversal of 15143940 is 4934151.

It can be written as a sum of positive squares in 4 ways, for example, as 7225344 + 7918596 = 2688^2 + 2814^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 149890 + ... + 149990.

It is an arithmetic number, because the mean of its divisors is an integer number (264537).

Almost surely, 2^15143940 is an apocalyptic number.

15143940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15143940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28569996).

15143940 is an abundant number, since it is smaller than the sum of its proper divisors (41996052).

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

15143940 is a wasteful number, since it uses less digits than its factorization.

15143940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 15143940 is about 3891.5215533259. The cubic root of 15143940 is about 247.4075565380.

The spelling of 15143940 in words is "fifteen million, one hundred forty-three thousand, nine hundred forty".