64892381 has 8 divisors (see below), whose sum is σ = 67470144. Its totient is φ = 62362080.

The previous prime is 64892371. The next prime is 64892423. The reversal of 64892381 is 18329846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64892381 - 2¹⁴ = 64875997 is a prime.

It is a super-2 number, since 2×64892381² = 8422042223698322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64892341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9065 + ... + 14558.

It is an arithmetic number, because the mean of its divisors is an integer number (8433768).

Almost surely, 2^64892381 is an apocalyptic number.

It is an amenable number.

64892381 is a deficient number, since it is larger than the sum of its proper divisors (2577763).

64892381 is a wasteful number, since it uses less digits than its factorization.

64892381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23731.

The product of its digits is 82944, while the sum is 41.

The square root of 64892381 is about 8055.5807363591. The cubic root of 64892381 is about 401.8505525191.

The spelling of 64892381 in words is "sixty-four million, eight hundred ninety-two thousand, three hundred eighty-one".