423778240 has 56 divisors (see below), whose sum is σ = 1013703840. Its totient is φ = 168741888.

The previous prime is 423778231. The next prime is 423778249. The reversal of 423778240 is 42877324.

It is an interprime number because it is at equal distance from previous prime (423778231) and next prime (423778249).

It is a self number, because there is not a number n which added to its sum of digits gives 423778240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423778249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70389 + ... + 76171.

Almost surely, 2^423778240 is an apocalyptic number.

423778240 is a gapful number since it is divisible by the number (40) 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 423778240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506851920).

423778240 is an abundant number, since it is smaller than the sum of its proper divisors (589925600).

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

423778240 is a wasteful number, since it uses less digits than its factorization.

423778240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029 (or 6019 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 423778240 is about 20585.8747688798. The cubic root of 423778240 is about 751.1261541155.

The spelling of 423778240 in words is "four hundred twenty-three million, seven hundred seventy-eight thousand, two hundred forty".