1144635402 has 16 divisors (see below), whose sum is σ = 2289692160. Its totient is φ = 381474912.

The previous prime is 1144635397. The next prime is 1144635407. The reversal of 1144635402 is 2045364411.

It is an interprime number because it is at equal distance from previous prime (1144635397) and next prime (1144635407).

It is a self number, because there is not a number n which added to its sum of digits gives 1144635402.

It is not an unprimeable number, because it can be changed into a prime (1144635407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26118 + ... + 54510.

It is an arithmetic number, because the mean of its divisors is an integer number (143105760).

Almost surely, 2^1144635402 is an apocalyptic number.

1144635402 is an abundant number, since it is smaller than the sum of its proper divisors (1145056758).

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

1144635402 is a wasteful number, since it uses less digits than its factorization.

1144635402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35117.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1144635402 is about 33832.4607736416. The cubic root of 1144635402 is about 1046.0579022941.

Adding to 1144635402 its reverse (2045364411), we get a palindrome (3189999813).

The spelling of 1144635402 in words is "one billion, one hundred forty-four million, six hundred thirty-five thousand, four hundred two".