404212140 has 48 divisors (see below), whose sum is σ = 1257550560. Its totient is φ = 107789760.

The previous prime is 404212103. The next prime is 404212147. The reversal of 404212140 is 41212404.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (404212147) 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, 373731 + ... + 374810.

It is an arithmetic number, because the mean of its divisors is an integer number (26198970).

Almost surely, 2^404212140 is an apocalyptic number.

It is an amenable number.

404212140 is an abundant number, since it is smaller than the sum of its proper divisors (853338420).

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

404212140 is a wasteful number, since it uses less digits than its factorization.

404212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748559 (or 748551 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 404212140 is about 20105.0277294014. The cubic root of 404212140 is about 739.3835504090.

Adding to 404212140 its reverse (41212404), we get a palindrome (445424544).

The spelling of 404212140 in words is "four hundred four million, two hundred twelve thousand, one hundred forty".