403613728 has 96 divisors (see below), whose sum is σ = 973897344. Its totient is φ = 160714752.

The previous prime is 403613699. The next prime is 403613731. The reversal of 403613728 is 827316304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 403613693 and 403613702.

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, 315426 + ... + 316702.

It is an arithmetic number, because the mean of its divisors is an integer number (10144764).

Almost surely, 2^403613728 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 403613728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486948672).

403613728 is an abundant number, since it is smaller than the sum of its proper divisors (570283616).

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

403613728 is a wasteful number, since it uses less digits than its factorization.

403613728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1386 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 403613728 is about 20090.1400691981. The cubic root of 403613728 is about 739.0184991002.

The spelling of 403613728 in words is "four hundred three million, six hundred thirteen thousand, seven hundred twenty-eight".