387390822 has 32 divisors (see below), whose sum is σ = 953578752. Its totient is φ = 102168864.

The previous prime is 387390793. The next prime is 387390823. The reversal of 387390822 is 228093783.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387390823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354208 + ... + 355299.

It is an arithmetic number, because the mean of its divisors is an integer number (29799336).

Almost surely, 2^387390822 is an apocalyptic number.

387390822 is an abundant number, since it is smaller than the sum of its proper divisors (566187930).

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

387390822 is a wasteful number, since it uses less digits than its factorization.

387390822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709532.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 387390822 is about 19682.2463656972. The cubic root of 387390822 is about 728.9813916269.

The spelling of 387390822 in words is "three hundred eighty-seven million, three hundred ninety thousand, eight hundred twenty-two".