15001380 has 36 divisors (see below), whose sum is σ = 45504732. Its totient is φ = 4000320.

The previous prime is 15001373. The next prime is 15001387. The reversal of 15001380 is 8310051.

It is a happy number.

15001380 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15001373) and next prime (15001387).

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 5116644 = 3144^2 + 2262^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (15001387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41491 + ... + 41850.

Almost surely, 2^15001380 is an apocalyptic number.

15001380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15001380 is an abundant number, since it is smaller than the sum of its proper divisors (30503352).

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

15001380 is a wasteful number, since it uses less digits than its factorization.

15001380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83356 (or 83351 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 15001380 is about 3873.1614993439. The cubic root of 15001380 is about 246.6287702515.

The spelling of 15001380 in words is "fifteen million, one thousand, three hundred eighty".