1400042040 has 32 divisors (see below), whose sum is σ = 4200126480. Its totient is φ = 373344512.

The previous prime is 1400042027. The next prime is 1400042041. The reversal of 1400042040 is 402400041.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400042041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5833389 + ... + 5833628.

Almost surely, 2^1400042040 is an apocalyptic number.

1400042040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400042040 is an abundant number, since it is smaller than the sum of its proper divisors (2800084440).

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

1400042040 is a wasteful number, since it uses less digits than its factorization.

1400042040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11667031 (or 11667027 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1400042040 is about 37417.1356466526. The cubic root of 1400042040 is about 1118.7001395129.

Adding to 1400042040 its reverse (402400041), we get a palindrome (1802442081).

The spelling of 1400042040 in words is "one billion, four hundred million, forty-two thousand, forty".