421394877900 has 288 divisors, whose sum is σ = 1376512522560. Its totient is φ = 111955737600.

The previous prime is 421394877899. The next prime is 421394877961. The reversal of 421394877900 is 9778493124.

421394877900 is a `hidden beast` number, since 42 + 1 + 39 + 487 + 7 + 90 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 61451272 + ... + 61458128.

It is an arithmetic number, because the mean of its divisors is an integer number (4779557370).

Almost surely, 2^421394877900 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 421394877900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688256261280).

421394877900 is an abundant number, since it is smaller than the sum of its proper divisors (955117644660).

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

421394877900 is a wasteful number, since it uses less digits than its factorization.

421394877900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7173 (or 7148 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 421394877900 in words is "four hundred twenty-one billion, three hundred ninety-four million, eight hundred seventy-seven thousand, nine hundred".