406138569 has 8 divisors (see below), whose sum is σ = 554111712. Its totient is φ = 264462240.

The previous prime is 406138561. The next prime is 406138571. The reversal of 406138569 is 965831604.

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

It is not a de Polignac number, because 406138569 - 2³ = 406138561 is a prime.

It is a super-2 number, since 2×406138569² = 329897074458735522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 406138569.

It is not an unprimeable number, because it can be changed into a prime (406138561) 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, 1574052 + ... + 1574309.

It is an arithmetic number, because the mean of its divisors is an integer number (69263964).

Almost surely, 2^406138569 is an apocalyptic number.

It is an amenable number.

406138569 is a deficient number, since it is larger than the sum of its proper divisors (147973143).

406138569 is a wasteful number, since it uses less digits than its factorization.

406138569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148407.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 406138569 is about 20152.8799182648. The cubic root of 406138569 is about 740.5562952379.

The spelling of 406138569 in words is "four hundred six million, one hundred thirty-eight thousand, five hundred sixty-nine".