38640455 has 16 divisors (see below), whose sum is σ = 53108544. Its totient is φ = 26438400.

The previous prime is 38640419. The next prime is 38640467. The reversal of 38640455 is 55404683.

It is a de Polignac number, because none of the positive numbers 2^k-38640455 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20555 + ... + 22355.

It is an arithmetic number, because the mean of its divisors is an integer number (3319284).

Almost surely, 2^38640455 is an apocalyptic number.

38640455 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38640455 is a deficient number, since it is larger than the sum of its proper divisors (14468089).

38640455 is a wasteful number, since it uses less digits than its factorization.

38640455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 38640455 is about 6216.1447055229. The cubic root of 38640455 is about 338.0757944235.

The spelling of 38640455 in words is "thirty-eight million, six hundred forty thousand, four hundred fifty-five".