16031398 has 4 divisors (see below), whose sum is σ = 24047100. Its totient is φ = 8015698.

The previous prime is 16031381. The next prime is 16031401. The reversal of 16031398 is 89313061.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4007848 + ... + 4007851.

It is an arithmetic number, because the mean of its divisors is an integer number (6011775).

Almost surely, 2^16031398 is an apocalyptic number.

16031398 is a deficient number, since it is larger than the sum of its proper divisors (8015702).

16031398 is an equidigital number, since it uses as much as digits as its factorization.

16031398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8015701.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 16031398 is about 4003.9228264291. The cubic root of 16031398 is about 252.1489314488.

The spelling of 16031398 in words is "sixteen million, thirty-one thousand, three hundred ninety-eight".