9940401 has 24 divisors (see below), whose sum is σ = 15681120. Its totient is φ = 6275232.

The previous prime is 9940397. The next prime is 9940433. The reversal of 9940401 is 1040499.

It is not a de Polignac number, because 9940401 - 2² = 9940397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (9940451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3541 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (653380).

Almost surely, 2^9940401 is an apocalyptic number.

It is an amenable number.

9940401 is a deficient number, since it is larger than the sum of its proper divisors (5740719).

9940401 is a wasteful number, since it uses less digits than its factorization.

9940401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187 (or 2175 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 9940401 is about 3152.8401481839. The cubic root of 9940401 is about 215.0146087063.

The spelling of 9940401 in words is "nine million, nine hundred forty thousand, four hundred one".