20398464 has 48 divisors (see below), whose sum is σ = 58702020. Its totient is φ = 6799104.

The previous prime is 20398459. The next prime is 20398471. The reversal of 20398464 is 46489302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7702 + ... + 10005.

Almost surely, 2^20398464 is an apocalyptic number.

20398464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20398464 is an abundant number, since it is smaller than the sum of its proper divisors (38303556).

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

20398464 is a wasteful number, since it uses less digits than its factorization.

20398464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17727 (or 17712 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 20398464 is about 4516.4658749956. The cubic root of 20398464 is about 273.2325836631.

The spelling of 20398464 in words is "twenty million, three hundred ninety-eight thousand, four hundred sixty-four".