421777152 has 144 divisors (see below), whose sum is σ = 1259104000. Its totient is φ = 139262976.

The previous prime is 421777091. The next prime is 421777159. The reversal of 421777152 is 251777124.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×421777152² = 355791931898462208, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421777159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960549 + ... + 960987.

Almost surely, 2^421777152 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 421777152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629552000).

421777152 is an abundant number, since it is smaller than the sum of its proper divisors (837326848).

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

421777152 is a wasteful number, since it uses less digits than its factorization.

421777152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 583 counting only the distinct ones).

The product of its digits is 27440, while the sum is 36.

The square root of 421777152 is about 20537.2138324555. The cubic root of 421777152 is about 749.9420115166.

The spelling of 421777152 in words is "four hundred twenty-one million, seven hundred seventy-seven thousand, one hundred fifty-two".