403720000 has 70 divisors (see below), whose sum is σ = 1001193578. Its totient is φ = 161472000.

The previous prime is 403719973. The next prime is 403720013. The reversal of 403720000 is 27304.

It can be written as a sum of positive squares in 5 ways, for example, as 156350016 + 247369984 = 12504^2 + 15728^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 34954 + ... + 45046.

Almost surely, 2^403720000 is an apocalyptic number.

403720000 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 403720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500596789).

403720000 is an abundant number, since it is smaller than the sum of its proper divisors (597473578).

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

403720000 is an equidigital number, since it uses as much as digits as its factorization.

403720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125 (or 10100 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 403720000 is about 20092.7847746399. The cubic root of 403720000 is about 739.0833549071.

Adding to 403720000 its reverse (27304), we get a palindrome (403747304).

The spelling of 403720000 in words is "four hundred three million, seven hundred twenty thousand".