821487360 has 72 divisors (see below), whose sum is σ = 2623637520. Its totient is φ = 219062272.

The previous prime is 821487319. The next prime is 821487361. The reversal of 821487360 is 63784128.

821487360 = T₄₃₁ + T₄₃₂ + ... + T₁₇₁₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821487361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103125 + ... + 110804.

It is an arithmetic number, because the mean of its divisors is an integer number (36439410).

Almost surely, 2^821487360 is an apocalyptic number.

821487360 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

821487360 is an abundant number, since it is smaller than the sum of its proper divisors (1802150160).

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

821487360 is a wasteful number, since it uses less digits than its factorization.

821487360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213953 (or 213939 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 821487360 is about 28661.6007926982. The cubic root of 821487360 is about 936.5557368887. Note that the first 3 decimals are identical.

The spelling of 821487360 in words is "eight hundred twenty-one million, four hundred eighty-seven thousand, three hundred sixty".