15429980 has 12 divisors (see below), whose sum is σ = 32403000. Its totient is φ = 6171984.

The previous prime is 15429977. The next prime is 15429989. The reversal of 15429980 is 8992451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15429989) 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, 385730 + ... + 385769.

It is an arithmetic number, because the mean of its divisors is an integer number (2700250).

Almost surely, 2^15429980 is an apocalyptic number.

15429980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15429980 is an abundant number, since it is smaller than the sum of its proper divisors (16973020).

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

15429980 is a wasteful number, since it uses less digits than its factorization.

15429980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771508 (or 771506 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 15429980 is about 3928.1013225221. The cubic root of 15429980 is about 248.9555357882.

The spelling of 15429980 in words is "fifteen million, four hundred twenty-nine thousand, nine hundred eighty".