1400234420 has 24 divisors (see below), whose sum is σ = 3166684584. Its totient is φ = 517009536.

The previous prime is 1400234399. The next prime is 1400234447. The reversal of 1400234420 is 244320041.

It can be written as a sum of positive squares in 4 ways, for example, as 13118884 + 1387115536 = 3622^2 + 37244^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1400234392 and 1400234401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2692499 + ... + 2693018.

It is an arithmetic number, because the mean of its divisors is an integer number (131945191).

Almost surely, 2^1400234420 is an apocalyptic number.

1400234420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400234420 is an abundant number, since it is smaller than the sum of its proper divisors (1766450164).

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

1400234420 is a wasteful number, since it uses less digits than its factorization.

1400234420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385539 (or 5385537 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1400234420 is about 37419.7063056353. The cubic root of 1400234420 is about 1118.7513774210.

Adding to 1400234420 its reverse (244320041), we get a palindrome (1644554461).

The spelling of 1400234420 in words is "one billion, four hundred million, two hundred thirty-four thousand, four hundred twenty".