140398407 has 16 divisors (see below), whose sum is σ = 208346880. Its totient is φ = 93441816.

The previous prime is 140398381. The next prime is 140398409. The reversal of 140398407 is 704893041.

It is a happy number.

It is not a de Polignac number, because 140398407 - 2⁶ = 140398343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140398409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13318 + ... + 21404.

It is an arithmetic number, because the mean of its divisors is an integer number (13021680).

Almost surely, 2^140398407 is an apocalyptic number.

140398407 is a deficient number, since it is larger than the sum of its proper divisors (67948473).

140398407 is an equidigital number, since it uses as much as digits as its factorization.

140398407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8739 (or 8733 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 140398407 is about 11848.9833741127. The cubic root of 140398407 is about 519.7414975007.

The spelling of 140398407 in words is "one hundred forty million, three hundred ninety-eight thousand, four hundred seven".