1402220144 has 20 divisors (see below), whose sum is σ = 2925786696. Its totient is φ = 647178432.

The previous prime is 1402220143. The next prime is 1402220147. The reversal of 1402220144 is 4410222041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402220143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3370514 + ... + 3370929.

Almost surely, 2^1402220144 is an apocalyptic number.

It is an amenable number.

1402220144 is an abundant number, since it is smaller than the sum of its proper divisors (1523566552).

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

1402220144 is a wasteful number, since it uses less digits than its factorization.

1402220144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741464 (or 6741458 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1402220144 is about 37446.2300372147. The cubic root of 1402220144 is about 1119.2799751353.

Adding to 1402220144 its reverse (4410222041), we get a palindrome (5812442185).

The spelling of 1402220144 in words is "one billion, four hundred two million, two hundred twenty thousand, one hundred forty-four".