140006404 has 12 divisors (see below), whose sum is σ = 245966364. Its totient is φ = 69730304.

The previous prime is 140006401. The next prime is 140006411. The reversal of 140006404 is 404600041.

It can be written as a sum of positive squares in 2 ways, for example, as 76038400 + 63968004 = 8720^2 + 7998^2 .

It is a super-2 number, since 2×140006404² = 39203586322022432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140006401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67069 + ... + 69124.

It is an arithmetic number, because the mean of its divisors is an integer number (20497197).

Almost surely, 2^140006404 is an apocalyptic number.

It is an amenable number.

140006404 is a deficient number, since it is larger than the sum of its proper divisors (105959960).

140006404 is a wasteful number, since it uses less digits than its factorization.

140006404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136454 (or 136452 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140006404 is about 11832.4301814970. The cubic root of 140006404 is about 519.2573273816.

Adding to 140006404 its reverse (404600041), we get a palindrome (544606445).

The spelling of 140006404 in words is "one hundred forty million, six thousand, four hundred four".