423781416 has 64 divisors (see below), whose sum is σ = 1182240000. Its totient is φ = 140652288.

The previous prime is 423781409. The next prime is 423781447. The reversal of 423781416 is 614187324.

423781416 is a `hidden beast` number, since 4 + 237 + 8 + 1 + 416 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47520 + ... + 55728.

It is an arithmetic number, because the mean of its divisors is an integer number (18472500).

Almost surely, 2^423781416 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 423781416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591120000).

423781416 is an abundant number, since it is smaller than the sum of its proper divisors (758458584).

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

423781416 is a wasteful number, since it uses less digits than its factorization.

423781416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463 (or 8453 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 423781416 is about 20585.9519090082. The cubic root of 423781416 is about 751.1280305455.

The spelling of 423781416 in words is "four hundred twenty-three million, seven hundred eighty-one thousand, four hundred sixteen".