1400236420 has 48 divisors (see below), whose sum is σ = 3216931200. Its totient is φ = 507729920.

The previous prime is 1400236379. The next prime is 1400236429. The reversal of 1400236420 is 246320041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1400236391 and 1400236400.

It is not an unprimeable number, because it can be changed into a prime (1400236429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70116 + ... + 87844.

It is an arithmetic number, because the mean of its divisors is an integer number (67019400).

Almost surely, 2^1400236420 is an apocalyptic number.

1400236420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400236420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608465600).

1400236420 is an abundant number, since it is smaller than the sum of its proper divisors (1816694780).

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

1400236420 is a wasteful number, since it uses less digits than its factorization.

1400236420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18108 (or 18106 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1400236420 is about 37419.7330295127. The cubic root of 1400236420 is about 1118.7519100703.

Adding to 1400236420 its reverse (246320041), we get a palindrome (1646556461).

The spelling of 1400236420 in words is "one billion, four hundred million, two hundred thirty-six thousand, four hundred twenty".