1500449940 has 384 divisors, whose sum is σ = 5354657280. Its totient is φ = 345600000.

The previous prime is 1500449917. The next prime is 1500449947. The reversal of 1500449940 is 499440051.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1500449895 and 1500449904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500449947) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 14855890 + ... + 14855990.

It is an arithmetic number, because the mean of its divisors is an integer number (13944420).

Almost surely, 2^1500449940 is an apocalyptic number.

1500449940 is a gapful number since it is divisible by the number (10) 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 1500449940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2677328640).

1500449940 is an abundant number, since it is smaller than the sum of its proper divisors (3854207340).

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

1500449940 is a wasteful number, since it uses less digits than its factorization.

1500449940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1500449940 is about 38735.6417269677. The cubic root of 1500449940 is about 1144.8286872725.

Adding to 1500449940 its reverse (499440051), we get a palindrome (1999889991).

The spelling of 1500449940 in words is "one billion, five hundred million, four hundred forty-nine thousand, nine hundred forty".