40401342 has 40 divisors (see below), whose sum is σ = 91371456. Its totient is φ = 13341888.

The previous prime is 40401301. The next prime is 40401349. The reversal of 40401342 is 24310404.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401349) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17203 + ... + 19409.

Almost surely, 2^40401342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40401342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45685728).

40401342 is an abundant number, since it is smaller than the sum of its proper divisors (50970114).

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

40401342 is a wasteful number, since it uses less digits than its factorization.

40401342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334 (or 2325 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40401342 is about 6356.2049998407. The cubic root of 40401342 is about 343.1351936414.

Adding to 40401342 its reverse (24310404), we get a palindrome (64711746).

The spelling of 40401342 in words is "forty million, four hundred one thousand, three hundred forty-two".