15390040 has 16 divisors (see below), whose sum is σ = 34627680. Its totient is φ = 6156000.

The previous prime is 15390029. The next prime is 15390041. The reversal of 15390040 is 4009351.

It is a junction number, because it is equal to n+sod(n) for n = 15389993 and 15390020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15390041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192336 + ... + 192415.

It is an arithmetic number, because the mean of its divisors is an integer number (2164230).

Almost surely, 2^15390040 is an apocalyptic number.

15390040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15390040 is an abundant number, since it is smaller than the sum of its proper divisors (19237640).

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

15390040 is a wasteful number, since it uses less digits than its factorization.

15390040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384762 (or 384758 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 15390040 is about 3923.0141473107. The cubic root of 15390040 is about 248.7405457548.

Adding to 15390040 its reverse (4009351), we get a palindrome (19399391).

The spelling of 15390040 in words is "fifteen million, three hundred ninety thousand, forty".