1400042520 has 48 divisors (see below), whose sum is σ = 4550139360. Its totient is φ = 373344576.

The previous prime is 1400042513. The next prime is 1400042521. The reversal of 1400042520 is 252400041.

1400042520 is a `hidden beast` number, since 140 + 0 + 0 + 4 + 2 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1400042493 and 1400042502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400042521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1944144 + ... + 1944863.

It is an arithmetic number, because the mean of its divisors is an integer number (94794570).

Almost surely, 2^1400042520 is an apocalyptic number.

1400042520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400042520 is an abundant number, since it is smaller than the sum of its proper divisors (3150096840).

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

1400042520 is a wasteful number, since it uses less digits than its factorization.

1400042520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889024 (or 3889017 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1400042520 is about 37417.1420608255. The cubic root of 1400042520 is about 1118.7002673605.

Adding to 1400042520 its reverse (252400041), we get a palindrome (1652442561).

The spelling of 1400042520 in words is "one billion, four hundred million, forty-two thousand, five hundred twenty".