1902057402 has 48 divisors (see below), whose sum is σ = 4441709952. Its totient is φ = 541416960.

The previous prime is 1902057397. The next prime is 1902057403. The reversal of 1902057402 is 2047502091.

It is a self number, because there is not a number n which added to its sum of digits gives 1902057402.

It is not an unprimeable number, because it can be changed into a prime (1902057403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67738 + ... + 91610.

It is an arithmetic number, because the mean of its divisors is an integer number (92535624).

Almost surely, 2^1902057402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1902057402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220854976).

1902057402 is an abundant number, since it is smaller than the sum of its proper divisors (2539652550).

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

1902057402 is a wasteful number, since it uses less digits than its factorization.

1902057402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24163 (or 24156 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1902057402 is about 43612.5830695684. The cubic root of 1902057402 is about 1239.0092246113.

Adding to 1902057402 its reverse (2047502091), we get a palindrome (3949559493).

The spelling of 1902057402 in words is "one billion, nine hundred two million, fifty-seven thousand, four hundred two".