40120030 has 16 divisors (see below), whose sum is σ = 72382320. Its totient is φ = 16011072.

The previous prime is 40120009. The next prime is 40120033. The reversal of 40120030 is 3002104.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 40119989 and 40120016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40120033) 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, 181 + ... + 8959.

It is an arithmetic number, because the mean of its divisors is an integer number (4523895).

Almost surely, 2^40120030 is an apocalyptic number.

40120030 is a deficient number, since it is larger than the sum of its proper divisors (32262290).

40120030 is a wasteful number, since it uses less digits than its factorization.

40120030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9243.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 40120030 is about 6334.0374170035. The cubic root of 40120030 is about 342.3369284265.

Adding to 40120030 its reverse (3002104), we get a palindrome (43122134).

The spelling of 40120030 in words is "forty million, one hundred twenty thousand, thirty".