140457906 has 12 divisors (see below), whose sum is σ = 304325502. Its totient is φ = 46819296.

The previous prime is 140457887. The next prime is 140457943. The reversal of 140457906 is 609754041.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 21538881 = 10905^2 + 4641^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3901591 + ... + 3901626.

Almost surely, 2^140457906 is an apocalyptic number.

140457906 is an abundant number, since it is smaller than the sum of its proper divisors (163867596).

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

140457906 is a wasteful number, since it uses less digits than its factorization.

140457906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7803225 (or 7803222 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 140457906 is about 11851.4938298933. The cubic root of 140457906 is about 519.8149070040.

The spelling of 140457906 in words is "one hundred forty million, four hundred fifty-seven thousand, nine hundred six".