89198640 has 60 divisors (see below), whose sum is σ = 299561184. Its totient is φ = 23786112.

The previous prime is 89198639. The next prime is 89198647. The reversal of 89198640 is 4689198.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-3 number, since 3×89198640³ (a number of 25 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (89198647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61224 + ... + 62663.

Almost surely, 2^89198640 is an apocalyptic number.

89198640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89198640 is an abundant number, since it is smaller than the sum of its proper divisors (210362544).

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

89198640 is a wasteful number, since it uses less digits than its factorization.

89198640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123906 (or 123897 counting only the distinct ones).

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

The square root of 89198640 is about 9444.5031632162. The cubic root of 89198640 is about 446.8064264022.

The spelling of 89198640 in words is "eighty-nine million, one hundred ninety-eight thousand, six hundred forty".