64222040 has 16 divisors (see below), whose sum is σ = 144499680. Its totient is φ = 25688800.

The previous prime is 64222019. The next prime is 64222063. The reversal of 64222040 is 4022246.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802736 + ... + 802815.

It is an arithmetic number, because the mean of its divisors is an integer number (9031230).

Almost surely, 2^64222040 is an apocalyptic number.

It is an amenable number.

64222040 is an abundant number, since it is smaller than the sum of its proper divisors (80277640).

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

64222040 is a wasteful number, since it uses less digits than its factorization.

64222040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605562 (or 1605558 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 64222040 is about 8013.8654842716. The cubic root of 64222040 is about 400.4620494037.

Adding to 64222040 its reverse (4022246), we get a palindrome (68244286).

The spelling of 64222040 in words is "sixty-four million, two hundred twenty-two thousand, forty".