421697340 has 192 divisors, whose sum is σ = 1375395840. Its totient is φ = 108475200.

The previous prime is 421697333. The next prime is 421697351. The reversal of 421697340 is 43796124.

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

It is a junction number, because it is equal to n+sod(n) for n = 421697295 and 421697304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1355785 + ... + 1356095.

It is an arithmetic number, because the mean of its divisors is an integer number (7163520).

Almost surely, 2^421697340 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 421697340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687697920).

421697340 is an abundant number, since it is smaller than the sum of its proper divisors (953698500).

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

421697340 is a wasteful number, since it uses less digits than its factorization.

421697340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 421697340 is about 20535.2706337170. The cubic root of 421697340 is about 749.8947052180.

The spelling of 421697340 in words is "four hundred twenty-one million, six hundred ninety-seven thousand, three hundred forty".