16398420 has 48 divisors (see below), whose sum is σ = 46108608. Its totient is φ = 4354560.

The previous prime is 16398413. The next prime is 16398433. The reversal of 16398420 is 2489361.

16398420 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 a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19815 + ... + 20625.

It is an arithmetic number, because the mean of its divisors is an integer number (960596).

Almost surely, 2^16398420 is an apocalyptic number.

16398420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16398420 is an abundant number, since it is smaller than the sum of its proper divisors (29710188).

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

16398420 is a wasteful number, since it uses less digits than its factorization.

16398420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 16398420 is about 4049.4962649693. The cubic root of 16398420 is about 254.0586592361.

The spelling of 16398420 in words is "sixteen million, three hundred ninety-eight thousand, four hundred twenty".