421276735890 has 128 divisors (see below), whose sum is σ = 1139498496000. Its totient is φ = 110735771328.

The previous prime is 421276735889. The next prime is 421276735897. The reversal of 421276735890 is 98537672124.

It is a happy number.

421276735890 is a `hidden beast` number, since 4 + 212 + 76 + 7 + 358 + 9 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (421276735897) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13187317 + ... + 13219223.

It is an arithmetic number, because the mean of its divisors is an integer number (8902332000).

It is a 1-persistent number, because it is pandigital, but 2⋅421276735890 = 842553471780 is not.

Almost surely, 2^421276735890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421276735890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569749248000).

421276735890 is an abundant number, since it is smaller than the sum of its proper divisors (718221760110).

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

421276735890 is a wasteful number, since it uses less digits than its factorization.

421276735890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621 (or 32615 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 421276735890 in words is "four hundred twenty-one billion, two hundred seventy-six million, seven hundred thirty-five thousand, eight hundred ninety".