40115420 has 24 divisors (see below), whose sum is σ = 84478464. Its totient is φ = 16001216.

The previous prime is 40115407. The next prime is 40115423. The reversal of 40115420 is 2451104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40115423) 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, 5042 + ... + 10278.

It is an arithmetic number, because the mean of its divisors is an integer number (3519936).

Almost surely, 2^40115420 is an apocalyptic number.

It is an amenable number.

40115420 is an abundant number, since it is smaller than the sum of its proper divisors (44363044).

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

40115420 is a wasteful number, since it uses less digits than its factorization.

40115420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629 (or 5627 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40115420 is about 6333.6734996367. The cubic root of 40115420 is about 342.3238158268.

Adding to 40115420 its reverse (2451104), we get a palindrome (42566524).

The spelling of 40115420 in words is "forty million, one hundred fifteen thousand, four hundred twenty".