403253840 has 80 divisors (see below), whose sum is σ = 1035308736. Its totient is φ = 144844800.

The previous prime is 403253833. The next prime is 403253857. The reversal of 403253840 is 48352304.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×403253840² = 325227318949491200, which contains 22 as substring.

It is a congruent number.

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, 70280 + ... + 75800.

Almost surely, 2^403253840 is an apocalyptic number.

403253840 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 403253840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517654368).

403253840 is an abundant number, since it is smaller than the sum of its proper divisors (632054896).

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

403253840 is a wasteful number, since it uses less digits than its factorization.

403253840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628 (or 5622 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 403253840 is about 20081.1812401562. The cubic root of 403253840 is about 738.7987816158.

The spelling of 403253840 in words is "four hundred three million, two hundred fifty-three thousand, eight hundred forty".