402661260 has 96 divisors (see below), whose sum is σ = 1264401600. Its totient is φ = 106375680.

The previous prime is 402661249. The next prime is 402661261. The reversal of 402661260 is 62166204.

It is a happy number.

402661260 is a `hidden beast` number, since 40 + 2 + 6 + 612 + 6 + 0 = 666.

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

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (402661261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55440 + ... + 62280.

It is an arithmetic number, because the mean of its divisors is an integer number (13170850).

Almost surely, 2^402661260 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 402661260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632200800).

402661260 is an abundant number, since it is smaller than the sum of its proper divisors (861740340).

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

402661260 is a wasteful number, since it uses less digits than its factorization.

402661260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968 (or 6960 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 402661260 is about 20066.4212055862. The cubic root of 402661260 is about 738.4367168640.

The spelling of 402661260 in words is "four hundred two million, six hundred sixty-one thousand, two hundred sixty".