402729740 has 48 divisors (see below), whose sum is σ = 975143232. Its totient is φ = 136851456.

The previous prime is 402729739. The next prime is 402729791. The reversal of 402729740 is 47927204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 402729740.

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, 3092 + ... + 28548.

It is an arithmetic number, because the mean of its divisors is an integer number (20315484).

Almost surely, 2^402729740 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 402729740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487571616).

402729740 is an abundant number, since it is smaller than the sum of its proper divisors (572413492).

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

402729740 is a wasteful number, since it uses less digits than its factorization.

402729740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25586 (or 25584 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 402729740 is about 20068.1274662087. The cubic root of 402729740 is about 738.4785761015.

The spelling of 402729740 in words is "four hundred two million, seven hundred twenty-nine thousand, seven hundred forty".