56138493 has 8 divisors (see below), whose sum is σ = 75905856. Its totient is φ = 36898400.

The previous prime is 56138479. The next prime is 56138503. The reversal of 56138493 is 39483165.

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 56138493 - 2⁴ = 56138477 is a prime.

It is a super-2 number, since 2×56138493² = 6303060792622098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56138413) 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, 131568 + ... + 131993.

It is an arithmetic number, because the mean of its divisors is an integer number (9488232).

Almost surely, 2^56138493 is an apocalyptic number.

It is an amenable number.

56138493 is a deficient number, since it is larger than the sum of its proper divisors (19767363).

56138493 is a wasteful number, since it uses less digits than its factorization.

56138493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263635.

The product of its digits is 77760, while the sum is 39.

The square root of 56138493 is about 7492.5625122517. The cubic root of 56138493 is about 382.9013668894.

The spelling of 56138493 in words is "fifty-six million, one hundred thirty-eight thousand, four hundred ninety-three".