64274220 has 36 divisors (see below), whose sum is σ = 194965680. Its totient is φ = 17139744.

The previous prime is 64274219. The next prime is 64274227. The reversal of 64274220 is 2247246.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (64274227) 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, 178360 + ... + 178719.

Almost surely, 2^64274220 is an apocalyptic number.

64274220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64274220 is an abundant number, since it is smaller than the sum of its proper divisors (130691460).

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

64274220 is a wasteful number, since it uses less digits than its factorization.

64274220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357094 (or 357089 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 64274220 is about 8017.1204306783. The cubic root of 64274220 is about 400.5704776680.

The spelling of 64274220 in words is "sixty-four million, two hundred seventy-four thousand, two hundred twenty".