402127740 has 120 divisors (see below), whose sum is σ = 1441743072. Its totient is φ = 91912320.

The previous prime is 402127709. The next prime is 402127783. The reversal of 402127740 is 47721204.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6391 + ... + 29070.

Almost surely, 2^402127740 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 402127740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720871536).

402127740 is an abundant number, since it is smaller than the sum of its proper divisors (1039615332).

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

402127740 is a wasteful number, since it uses less digits than its factorization.

402127740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35489 (or 35478 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 402127740 is about 20053.1229488077. The cubic root of 402127740 is about 738.1104336029.

Adding to 402127740 its reverse (47721204), we get a palindrome (449848944).

The spelling of 402127740 in words is "four hundred two million, one hundred twenty-seven thousand, seven hundred forty".