1402220240 has 20 divisors (see below), whose sum is σ = 3260162244. Its totient is φ = 560888064.

The previous prime is 1402220233. The next prime is 1402220243. The reversal of 1402220240 is 420222041.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 341806144 + 1060414096 = 18488^2 + 32564^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402220243) 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, 8763797 + ... + 8763956.

Almost surely, 2^1402220240 is an apocalyptic number.

1402220240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402220240 is an abundant number, since it is smaller than the sum of its proper divisors (1857942004).

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

1402220240 is a wasteful number, since it uses less digits than its factorization.

1402220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17527766 (or 17527760 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1402220240 is about 37446.2313190527. The cubic root of 1402220240 is about 1119.2800006783.

Adding to 1402220240 its reverse (420222041), we get a palindrome (1822442281).

The spelling of 1402220240 in words is "one billion, four hundred two million, two hundred twenty thousand, two hundred forty".