838890406 has 4 divisors (see below), whose sum is σ = 1258335612. Its totient is φ = 419445202.

The previous prime is 838890383. The next prime is 838890539. The reversal of 838890406 is 604098838.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×838890406² = 1407474226557689672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209722600 + ... + 209722603.

It is an arithmetic number, because the mean of its divisors is an integer number (314583903).

Almost surely, 2^838890406 is an apocalyptic number.

838890406 is a deficient number, since it is larger than the sum of its proper divisors (419445206).

838890406 is a wasteful number, since it uses less digits than its factorization.

838890406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419445205.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 838890406 is about 28963.6048516064. The cubic root of 838890406 is about 943.1231586383.

The spelling of 838890406 in words is "eight hundred thirty-eight million, eight hundred ninety thousand, four hundred six".