64988946 has 64 divisors (see below), whose sum is σ = 161861760. Its totient is φ = 19154880.

The previous prime is 64988939. The next prime is 64988947.

64988946 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 64988892 and 64988901.

It is not an unprimeable number, because it can be changed into a prime (64988947) 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, 20500 + ... + 23456.

It is an arithmetic number, because the mean of its divisors is an integer number (2529090).

Almost surely, 2^64988946 is an apocalyptic number.

64988946 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 64988946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80930880).

64988946 is an abundant number, since it is smaller than the sum of its proper divisors (96872814).

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

64988946 is a wasteful number, since it uses less digits than its factorization.

64988946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016 (or 3010 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 64988946 is about 8061.5721791720. The cubic root of 64988946 is about 402.0497822065.

The spelling of 64988946 in words is "sixty-four million, nine hundred eighty-eight thousand, nine hundred forty-six".