15972198 has 64 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 4471200.

The previous prime is 15972193. The next prime is 15972199. The reversal of 15972198 is 89127951.

15972198 = T₆₂ + T₆₃ + ... + T₄₅₇.

It is a super-2 number, since 2×15972198² = 510222217902408, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15972193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58803 + ... + 59073.

It is an arithmetic number, because the mean of its divisors is an integer number (587520).

Almost surely, 2^15972198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15972198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18800640).

15972198 is an abundant number, since it is smaller than the sum of its proper divisors (21629082).

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

15972198 is a wasteful number, since it uses less digits than its factorization.

15972198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353.

The product of its digits is 45360, while the sum is 42.

The square root of 15972198 is about 3996.5232390166. The cubic root of 15972198 is about 251.8381740067.

The spelling of 15972198 in words is "fifteen million, nine hundred seventy-two thousand, one hundred ninety-eight".