387747822 has 64 divisors (see below), whose sum is σ = 980181504. Its totient is φ = 99325440.

The previous prime is 387747797. The next prime is 387747847. The reversal of 387747822 is 228747783.

It is an interprime number because it is at equal distance from previous prime (387747797) and next prime (387747847).

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, 27978 + ... + 39474.

It is an arithmetic number, because the mean of its divisors is an integer number (15315336).

Almost surely, 2^387747822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 387747822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490090752).

387747822 is an abundant number, since it is smaller than the sum of its proper divisors (592433682).

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

387747822 is a wasteful number, since it uses less digits than its factorization.

387747822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11593.

The product of its digits is 1053696, while the sum is 48.

The square root of 387747822 is about 19691.3133640192. The cubic root of 387747822 is about 729.2052538005.

The spelling of 387747822 in words is "three hundred eighty-seven million, seven hundred forty-seven thousand, eight hundred twenty-two".