64898190 has 96 divisors (see below), whose sum is σ = 199120896. Its totient is φ = 14351040.

The previous prime is 64898179. The next prime is 64898191. The reversal of 64898190 is 9189846.

64898190 is a `hidden beast` number, since 6 + 489 + 81 + 90 = 666.

It is a super-2 number, since 2×64898190² = 8423550130552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64898191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17869 + ... + 21191.

It is an arithmetic number, because the mean of its divisors is an integer number (2074176).

Almost surely, 2^64898190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64898190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99560448).

64898190 is an abundant number, since it is smaller than the sum of its proper divisors (134222706).

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

64898190 is a wasteful number, since it uses less digits than its factorization.

64898190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 64898190 is about 8055.9412857841. The cubic root of 64898190 is about 401.8625430392.

The spelling of 64898190 in words is "sixty-four million, eight hundred ninety-eight thousand, one hundred ninety".