140331402 has 12 divisors (see below), whose sum is σ = 304051410. Its totient is φ = 46777128.

The previous prime is 140331371. The next prime is 140331407. The reversal of 140331402 is 204133041.

It can be written as a sum of positive squares in only one way, i.e., 136679481 + 3651921 = 11691^2 + 1911^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 7796189 = 140331402 / (1 + 4 + 0 + 3 + 3 + 1 + 4 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (140331407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3898077 + ... + 3898112.

Almost surely, 2^140331402 is an apocalyptic number.

140331402 is an abundant number, since it is smaller than the sum of its proper divisors (163720008).

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

140331402 is a wasteful number, since it uses less digits than its factorization.

140331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7796197 (or 7796194 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 140331402 is about 11846.1555789210. The cubic root of 140331402 is about 519.6588023064.

Adding to 140331402 its reverse (204133041), we get a palindrome (344464443).

The spelling of 140331402 in words is "one hundred forty million, three hundred thirty-one thousand, four hundred two".