38693407 has 4 divisors (see below), whose sum is σ = 38847816. Its totient is φ = 38539000.

The previous prime is 38693387. The next prime is 38693423. The reversal of 38693407 is 70439683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70439683 = 1321 ⋅53323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38693407 is a prime.

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 38693407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38693437) 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, 76828 + ... + 77329.

It is an arithmetic number, because the mean of its divisors is an integer number (9711954).

Almost surely, 2^38693407 is an apocalyptic number.

38693407 is a deficient number, since it is larger than the sum of its proper divisors (154409).

38693407 is a wasteful number, since it uses less digits than its factorization.

38693407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154408.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 38693407 is about 6220.4024789398. The cubic root of 38693407 is about 338.2301543923.

The spelling of 38693407 in words is "thirty-eight million, six hundred ninety-three thousand, four hundred seven".