838202421 has 8 divisors (see below), whose sum is σ = 1277260864. Its totient is φ = 478972800.

The previous prime is 838202411. The next prime is 838202447. The reversal of 838202421 is 124202838.

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

It is not a de Polignac number, because 838202421 - 2⁵ = 838202389 is a prime.

It is a super-2 number, since 2×838202421² = 1405166597140522482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838202411) 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, 19957180 + ... + 19957221.

It is an arithmetic number, because the mean of its divisors is an integer number (159657608).

Almost surely, 2^838202421 is an apocalyptic number.

It is an amenable number.

838202421 is a deficient number, since it is larger than the sum of its proper divisors (439058443).

838202421 is a wasteful number, since it uses less digits than its factorization.

838202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39914411.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 838202421 is about 28951.7256998611. The cubic root of 838202421 is about 942.8652655767.

The spelling of 838202421 in words is "eight hundred thirty-eight million, two hundred two thousand, four hundred twenty-one".