40003120 has 40 divisors (see below), whose sum is σ = 93270816. Its totient is φ = 15955968.

The previous prime is 40003111. The next prime is 40003133. The reversal of 40003120 is 2130004.

It is a tau number, because it is divible by the number of its divisors (40).

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 = 40003097 and 40003106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53469 + ... + 54211.

Almost surely, 2^40003120 is an apocalyptic number.

40003120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40003120 is an abundant number, since it is smaller than the sum of its proper divisors (53267696).

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

40003120 is a wasteful number, since it uses less digits than its factorization.

40003120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429 (or 1423 counting only the distinct ones).

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

The square root of 40003120 is about 6324.8019731846. The cubic root of 40003120 is about 342.0040809791.

Adding to 40003120 its reverse (2130004), we get a palindrome (42133124).

The spelling of 40003120 in words is "forty million, three thousand, one hundred twenty".