387208290 has 192 divisors, whose sum is σ = 1158312960. Its totient is φ = 82414080.

The previous prime is 387208271. The next prime is 387208291. The reversal of 387208290 is 92802783.

It is not an unprimeable number, because it can be changed into a prime (387208291) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1321384 + ... + 1321676.

It is an arithmetic number, because the mean of its divisors is an integer number (6032880).

Almost surely, 2^387208290 is an apocalyptic number.

387208290 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 387208290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (579156480).

387208290 is an abundant number, since it is smaller than the sum of its proper divisors (771104670).

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

387208290 is a wasteful number, since it uses less digits than its factorization.

387208290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 387208290 is about 19677.6088486381. The cubic root of 387208290 is about 728.8668790742.

The spelling of 387208290 in words is "three hundred eighty-seven million, two hundred eight thousand, two hundred ninety".