1215327740 has 96 divisors (see below), whose sum is σ = 2896121088. Its totient is φ = 424512000.

The previous prime is 1215327733. The next prime is 1215327793. The reversal of 1215327740 is 477235121.

It is a super-2 number, since 2×1215327740² = 2954043031227015200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215327697 and 1215327706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 603335 + ... + 605345.

It is an arithmetic number, because the mean of its divisors is an integer number (30167928).

Almost surely, 2^1215327740 is an apocalyptic number.

1215327740 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 1215327740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448060544).

1215327740 is an abundant number, since it is smaller than the sum of its proper divisors (1680793348).

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

1215327740 is a wasteful number, since it uses less digits than its factorization.

1215327740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2137 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1215327740 is about 34861.5510268835. The cubic root of 1215327740 is about 1067.1639280886.

It can be divided in two parts, 12153 and 27740, that added together give a palindrome (39893).

The spelling of 1215327740 in words is "one billion, two hundred fifteen million, three hundred twenty-seven thousand, seven hundred forty".