421861392 has 240 divisors, whose sum is σ = 1339993600. Its totient is φ = 126904320.

The previous prime is 421861367. The next prime is 421861403. The reversal of 421861392 is 293168124.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (20736) is a multiple of the sum of its prime divisors (162).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3870234 + ... + 3870342.

Almost surely, 2^421861392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421861392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669996800).

421861392 is an abundant number, since it is smaller than the sum of its proper divisors (918132208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421861392 is a wasteful number, since it uses less digits than its factorization.

421861392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 162 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 421861392 is about 20539.2646411696. The cubic root of 421861392 is about 749.9919359133.

The spelling of 421861392 in words is "four hundred twenty-one million, eight hundred sixty-one thousand, three hundred ninety-two".