387450690 has 32 divisors (see below), whose sum is σ = 1014417216. Its totient is φ = 93927360.

The previous prime is 387450673. The next prime is 387450733. The reversal of 387450690 is 96054783.

It is a happy number.

It is a super-2 number, since 2×387450690² = 300236074362952200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586717 + ... + 587376.

It is an arithmetic number, because the mean of its divisors is an integer number (31700538).

Almost surely, 2^387450690 is an apocalyptic number.

387450690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

387450690 is an abundant number, since it is smaller than the sum of its proper divisors (626966526).

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

387450690 is a wasteful number, since it uses less digits than its factorization.

387450690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174114.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 387450690 is about 19683.7671699296. The cubic root of 387450690 is about 729.0189423443.

The spelling of 387450690 in words is "three hundred eighty-seven million, four hundred fifty thousand, six hundred ninety".