406139390 has 8 divisors (see below), whose sum is σ = 731050920. Its totient is φ = 162455752.

The previous prime is 406139389. The next prime is 406139411. The reversal of 406139390 is 93931604.

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

It is a self number, because there is not a number n which added to its sum of digits gives 406139390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20306960 + ... + 20306979.

It is an arithmetic number, because the mean of its divisors is an integer number (91381365).

Almost surely, 2^406139390 is an apocalyptic number.

406139390 is a deficient number, since it is larger than the sum of its proper divisors (324911530).

406139390 is a wasteful number, since it uses less digits than its factorization.

406139390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40613946.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 406139390 is about 20152.9002875517. The cubic root of 406139390 is about 740.5567942436.

The spelling of 406139390 in words is "four hundred six million, one hundred thirty-nine thousand, three hundred ninety".