140262639 has 16 divisors (see below), whose sum is σ = 206043264. Its totient is φ = 84164000.

The previous prime is 140262623. The next prime is 140262649. The reversal of 140262639 is 936262041.

It is a cyclic number.

It is not a de Polignac number, because 140262639 - 2⁴ = 140262623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140262649) 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, 17709 + ... + 24374.

It is an arithmetic number, because the mean of its divisors is an integer number (12877704).

Almost surely, 2^140262639 is an apocalyptic number.

140262639 is a deficient number, since it is larger than the sum of its proper divisors (65780625).

140262639 is a wasteful number, since it uses less digits than its factorization.

140262639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42198.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 140262639 is about 11843.2528893037. The cubic root of 140262639 is about 519.5739100780.

The spelling of 140262639 in words is "one hundred forty million, two hundred sixty-two thousand, six hundred thirty-nine".