2015420280 has 64 divisors (see below), whose sum is σ = 6058851840. Its totient is φ = 536326272.

The previous prime is 2015420263. The next prime is 2015420293. The reversal of 2015420280 is 820245102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2015420280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41197 + ... + 75683.

It is an arithmetic number, because the mean of its divisors is an integer number (94669560).

Almost surely, 2^2015420280 is an apocalyptic number.

2015420280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015420280 is an abundant number, since it is smaller than the sum of its proper divisors (4043431560).

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

2015420280 is a wasteful number, since it uses less digits than its factorization.

2015420280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34988 (or 34984 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 2015420280 is about 44893.4324818230. The cubic root of 2015420280 is about 1263.1508192988.

Adding to 2015420280 its reverse (820245102), we get a palindrome (2835665382).

The spelling of 2015420280 in words is "two billion, fifteen million, four hundred twenty thousand, two hundred eighty".