140399889 has 32 divisors (see below), whose sum is σ = 236390400. Its totient is φ = 72221952.

The previous prime is 140399879. The next prime is 140399891. The reversal of 140399889 is 988993041.

It is a happy number.

It is not a de Polignac number, because 140399889 - 2⁷ = 140399761 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (140399839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339 + ... + 16760.

It is an arithmetic number, because the mean of its divisors is an integer number (7387200).

Almost surely, 2^140399889 is an apocalyptic number.

It is an amenable number.

140399889 is a deficient number, since it is larger than the sum of its proper divisors (95990511).

140399889 is a wasteful number, since it uses less digits than its factorization.

140399889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17149.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 140399889 is about 11849.0459109584. The cubic root of 140399889 is about 519.7433262351.

The spelling of 140399889 in words is "one hundred forty million, three hundred ninety-nine thousand, eight hundred eighty-nine".