16898440 has 32 divisors (see below), whose sum is σ = 40947480. Its totient is φ = 6239232.

The previous prime is 16898423. The next prime is 16898447. The reversal of 16898440 is 4489861.

16898440 = T₇₇ + T₇₈ + ... + T₄₆₆.

It can be written as a sum of positive squares in 4 ways, for example, as 13235044 + 3663396 = 3638^2 + 1914^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 16898393 and 16898402.

It is not an unprimeable number, because it can be changed into a prime (16898447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15729 + ... + 16768.

Almost surely, 2^16898440 is an apocalyptic number.

16898440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16898440 is an abundant number, since it is smaller than the sum of its proper divisors (24049040).

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

16898440 is a wasteful number, since it uses less digits than its factorization.

16898440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32521 (or 32517 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 16898440 is about 4110.7712171805. The cubic root of 16898440 is about 256.6150980522.

The spelling of 16898440 in words is "sixteen million, eight hundred ninety-eight thousand, four hundred forty".