40120000 has 140 divisors (see below), whose sum is σ = 107121960. Its totient is φ = 14848000.

The previous prime is 40119991. The next prime is 40120009. The reversal of 40120000 is 2104.

It is an interprime number because it is at equal distance from previous prime (40119991) and next prime (40120009).

It is a super-2 number, since 2×40120000² = 3219228800000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120009) 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, 679971 + ... + 680029.

Almost surely, 2^40120000 is an apocalyptic number.

40120000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53560980).

40120000 is an abundant number, since it is smaller than the sum of its proper divisors (67001960).

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

40120000 is an equidigital number, since it uses as much as digits as its factorization.

40120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 40120000 is about 6334.0350488452. The cubic root of 40120000 is about 342.3368430983.

Adding to 40120000 its reverse (2104), we get a palindrome (40122104).

The spelling of 40120000 in words is "forty million, one hundred twenty thousand".