421472772 has 144 divisors (see below), whose sum is σ = 1324552320. Its totient is φ = 110232576.

The previous prime is 421472771. The next prime is 421472773. The reversal of 421472772 is 277274124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421472771) and next prime (421472773).

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.

It is not an unprimeable number, because it can be changed into a prime (421472771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157179 + ... + 159837.

It is an arithmetic number, because the mean of its divisors is an integer number (9198280).

Almost surely, 2^421472772 is an apocalyptic number.

421472772 is a gapful number since it is divisible by the number (42) 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 421472772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662276160).

421472772 is an abundant number, since it is smaller than the sum of its proper divisors (903079548).

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

421472772 is a wasteful number, since it uses less digits than its factorization.

421472772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2725 counting only the distinct ones).

The product of its digits is 43904, while the sum is 36.

The square root of 421472772 is about 20529.8020448323. The cubic root of 421472772 is about 749.7615668742.

The spelling of 421472772 in words is "four hundred twenty-one million, four hundred seventy-two thousand, seven hundred seventy-two".