421976040 has 128 divisors (see below), whose sum is σ = 1362769920. Its totient is φ = 104140800.

The previous prime is 421976033. The next prime is 421976047. The reversal of 421976040 is 40679124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421976033) and next prime (421976047).

It is a junction number, because it is equal to n+sod(n) for n = 421975992 and 421976010.

It is not an unprimeable number, because it can be changed into a prime (421976047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122745 + ... + 126135.

It is an arithmetic number, because the mean of its divisors is an integer number (10646640).

Almost surely, 2^421976040 is an apocalyptic number.

421976040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421976040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681384960).

421976040 is an abundant number, since it is smaller than the sum of its proper divisors (940793880).

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

421976040 is a wasteful number, since it uses less digits than its factorization.

421976040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483 (or 3479 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 421976040 is about 20542.0553986207. The cubic root of 421976040 is about 750.0598707761.

The spelling of 421976040 in words is "four hundred twenty-one million, nine hundred seventy-six thousand, forty".