402708240 has 320 divisors, whose sum is σ = 1603825920. Its totient is φ = 91791360.

The previous prime is 402708143. The next prime is 402708307. The reversal of 402708240 is 42807204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 403422 + ... + 404418.

It is an arithmetic number, because the mean of its divisors is an integer number (5011956).

Almost surely, 2^402708240 is an apocalyptic number.

402708240 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 402708240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801912960).

402708240 is an abundant number, since it is smaller than the sum of its proper divisors (1201117680).

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

402708240 is a wasteful number, since it uses less digits than its factorization.

402708240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 402708240 is about 20067.5917837692. The cubic root of 402708240 is about 738.4654344746.

The spelling of 402708240 in words is "four hundred two million, seven hundred eight thousand, two hundred forty".