140400387 has 6 divisors (see below), whose sum is σ = 202800572. Its totient is φ = 93600252.

The previous prime is 140400373. The next prime is 140400401. The reversal of 140400387 is 783004041.

It is an interprime number because it is at equal distance from previous prime (140400373) and next prime (140400401).

It is not a de Polignac number, because 140400387 - 2¹¹ = 140398339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140400387.

It is not an unprimeable number, because it can be changed into a prime (140400187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7800013 + ... + 7800030.

Almost surely, 2^140400387 is an apocalyptic number.

140400387 is a deficient number, since it is larger than the sum of its proper divisors (62400185).

140400387 is a wasteful number, since it uses less digits than its factorization.

140400387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15600049 (or 15600046 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 140400387 is about 11849.0669252899. The cubic root of 140400387 is about 519.7439407462.

The spelling of 140400387 in words is "one hundred forty million, four hundred thousand, three hundred eighty-seven".