64038623 has 4 divisors (see below), whose sum is σ = 69860328. Its totient is φ = 58216920.

The previous prime is 64038619. The next prime is 64038629. The reversal of 64038623 is 32683046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64038623 - 2² = 64038619 is a prime.

It is a super-2 number, since 2×64038623² = 8201890471472258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64038623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64038629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2910836 + ... + 2910857.

It is an arithmetic number, because the mean of its divisors is an integer number (17465082).

Almost surely, 2^64038623 is an apocalyptic number.

64038623 is a deficient number, since it is larger than the sum of its proper divisors (5821705).

64038623 is a wasteful number, since it uses less digits than its factorization.

64038623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821704.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 64038623 is about 8002.4135734165. The cubic root of 64038623 is about 400.0804484024.

It can be divided in two parts, 640386 and 23, that multiplied together give a triangular number (14728878 = T₅₄₂₇).

The spelling of 64038623 in words is "sixty-four million, thirty-eight thousand, six hundred twenty-three".