366821478 has 96 divisors (see below), whose sum is σ = 873905760. Its totient is φ = 110730240.

The previous prime is 366821471. The next prime is 366821479. The reversal of 366821478 is 874128663.

366821478 is a `hidden beast` number, since 366 + 8 + 214 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366821471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2026548 + ... + 2026728.

It is an arithmetic number, because the mean of its divisors is an integer number (9103185).

Almost surely, 2^366821478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 366821478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436952880).

366821478 is an abundant number, since it is smaller than the sum of its proper divisors (507084282).

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

366821478 is a wasteful number, since it uses less digits than its factorization.

366821478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 419 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 366821478 is about 19152.5841076341. The cubic root of 366821478 is about 715.8437741088.

The spelling of 366821478 in words is "three hundred sixty-six million, eight hundred twenty-one thousand, four hundred seventy-eight".