401196640 has 48 divisors (see below), whose sum is σ = 1020742128. Its totient is φ = 148133376.

The previous prime is 401196629. The next prime is 401196641. The reversal of 401196640 is 46691104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401196641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94362 + ... + 98521.

It is an arithmetic number, because the mean of its divisors is an integer number (21265461).

Almost surely, 2^401196640 is an apocalyptic number.

401196640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401196640 is an abundant number, since it is smaller than the sum of its proper divisors (619545488).

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

401196640 is a wasteful number, since it uses less digits than its factorization.

401196640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192911 (or 192903 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 401196640 is about 20029.8936592284. The cubic root of 401196640 is about 737.5403114995.

The spelling of 401196640 in words is "four hundred one million, one hundred ninety-six thousand, six hundred forty".