1400422638 has 8 divisors (see below), whose sum is σ = 2800845288. Its totient is φ = 466807544.

The previous prime is 1400422633. The next prime is 1400422649. The reversal of 1400422638 is 8362240041.

It is a sphenic number, since it is the product of 3 distinct primes.

1400422638 is an admirable number.

It is a super-2 number, since 2×1400422638² = 3922367130045758088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400422633) 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, 116701881 + ... + 116701892.

It is an arithmetic number, because the mean of its divisors is an integer number (350105661).

Almost surely, 2^1400422638 is an apocalyptic number.

1400422638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1400422638 is a wasteful number, since it uses less digits than its factorization.

1400422638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233403778.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1400422638 is about 37422.2211794009. The cubic root of 1400422638 is about 1118.8015022928.

Adding to 1400422638 its reverse (8362240041), we get a palindrome (9762662679).

The spelling of 1400422638 in words is "one billion, four hundred million, four hundred twenty-two thousand, six hundred thirty-eight".