16399480 has 16 divisors (see below), whose sum is σ = 36898920. Its totient is φ = 6559776.

The previous prime is 16399477. The next prime is 16399507. The reversal of 16399480 is 8499361.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 409987 = 16399480 / (1 + 6 + 3 + 9 + 9 + 4 + 8 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204954 + ... + 205033.

Almost surely, 2^16399480 is an apocalyptic number.

16399480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16399480 is an abundant number, since it is smaller than the sum of its proper divisors (20499440).

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

16399480 is a wasteful number, since it uses less digits than its factorization.

16399480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409998 (or 409994 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 16399480 is about 4049.6271433306. The cubic root of 16399480 is about 254.0641332671.

The spelling of 16399480 in words is "sixteen million, three hundred ninety-nine thousand, four hundred eighty".