1400440221 has 24 divisors (see below), whose sum is σ = 2108427776. Its totient is φ = 894719520.

The previous prime is 1400440219. The next prime is 1400440271. The reversal of 1400440221 is 1220440041.

1400440221 is a `hidden beast` number, since 1 + 4 + 0 + 0 + 440 + 221 = 666.

It is not a de Polignac number, because 1400440221 - 2¹ = 1400440219 is a prime.

It is a super-2 number, since 2×1400440221² = 3922465625189057682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1400440194 and 1400440203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400440271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4371 + ... + 53103.

Almost surely, 2^1400440221 is an apocalyptic number.

It is an amenable number.

1400440221 is a deficient number, since it is larger than the sum of its proper divisors (707987555).

1400440221 is a wasteful number, since it uses less digits than its factorization.

1400440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48873 (or 48870 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1400440221 is about 37422.4561059266. The cubic root of 1400440221 is about 1118.8061846423.

Adding to 1400440221 its reverse (1220440041), we get a palindrome (2620880262).

The spelling of 1400440221 in words is "one billion, four hundred million, four hundred forty thousand, two hundred twenty-one".