49815000 has 240 divisors, whose sum is σ = 179098920. Its totient is φ = 12960000.

The previous prime is 49814983. The next prime is 49815013. The reversal of 49815000 is 51894.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 615 × 135 × 600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1214980 + ... + 1215020.

Almost surely, 2^49815000 is an apocalyptic number.

49815000 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 49815000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89549460).

49815000 is an abundant number, since it is smaller than the sum of its proper divisors (129283920).

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

49815000 is an equidigital number, since it uses as much as digits as its factorization.

49815000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 49815000 is about 7057.9742136112. The cubic root of 49815000 is about 367.9482244423.

Adding to 49815000 its reverse (51894), we get a palindrome (49866894).

The spelling of 49815000 in words is "forty-nine million, eight hundred fifteen thousand".