140271906 has 32 divisors (see below), whose sum is σ = 288787968. Its totient is φ = 45394560.

The previous prime is 140271899. The next prime is 140271907. The reversal of 140271906 is 609172041.

It is a happy number.

It is a super-2 number, since 2×140271906² = 39352415225745672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140271907) 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, 53580 + ... + 56136.

It is an arithmetic number, because the mean of its divisors is an integer number (9024624).

Almost surely, 2^140271906 is an apocalyptic number.

140271906 is an abundant number, since it is smaller than the sum of its proper divisors (148516062).

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

140271906 is a wasteful number, since it uses less digits than its factorization.

140271906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 140271906 is about 11843.6441182602. The cubic root of 140271906 is about 519.5853523870.

The spelling of 140271906 in words is "one hundred forty million, two hundred seventy-one thousand, nine hundred six".