38405929 has 12 divisors (see below), whose sum is σ = 40700800. Its totient is φ = 36231624.

The previous prime is 38405911. The next prime is 38405933. The reversal of 38405929 is 92950483.

It is a happy number.

It is not a de Polignac number, because 38405929 - 2¹¹ = 38403881 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 38405891 and 38405900.

It is not an unprimeable number, because it can be changed into a prime (38405989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41332 + ... + 42250.

Almost surely, 2^38405929 is an apocalyptic number.

It is an amenable number.

38405929 is a deficient number, since it is larger than the sum of its proper divisors (2294871).

38405929 is an equidigital number, since it uses as much as digits as its factorization.

38405929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 38405929 is about 6197.2517295976. The cubic root of 38405929 is about 337.3904288114.

The spelling of 38405929 in words is "thirty-eight million, four hundred five thousand, nine hundred twenty-nine".