64494276 has 96 divisors (see below), whose sum is σ = 189063168. Its totient is φ = 16623360.

The previous prime is 64494239. The next prime is 64494299. The reversal of 64494276 is 67249446.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205896 + ... + 206208.

It is an arithmetic number, because the mean of its divisors is an integer number (1969408).

Almost surely, 2^64494276 is an apocalyptic number.

64494276 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64494276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94531584).

64494276 is an abundant number, since it is smaller than the sum of its proper divisors (124568892).

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

64494276 is a wasteful number, since it uses less digits than its factorization.

64494276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its digits is 290304, while the sum is 42.

The square root of 64494276 is about 8030.8328335236. The cubic root of 64494276 is about 401.0271020627.

The spelling of 64494276 in words is "sixty-four million, four hundred ninety-four thousand, two hundred seventy-six".