64023819 has 16 divisors (see below), whose sum is σ = 90779040. Its totient is φ = 39997440.

The previous prime is 64023803. The next prime is 64023821. The reversal of 64023819 is 91832046.

It is not a de Polignac number, because 64023819 - 2⁴ = 64023803 is a prime.

It is a super-2 number, since 2×64023819² = 8198098798689522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64023819.

It is not an unprimeable number, because it can be changed into a prime (64023889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9687 + ... + 14895.

It is an arithmetic number, because the mean of its divisors is an integer number (5673690).

Almost surely, 2^64023819 is an apocalyptic number.

64023819 is a deficient number, since it is larger than the sum of its proper divisors (26755221).

64023819 is a wasteful number, since it uses less digits than its factorization.

64023819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 64023819 is about 8001.4885490139. The cubic root of 64023819 is about 400.0496167619.

The spelling of 64023819 in words is "sixty-four million, twenty-three thousand, eight hundred nineteen".