380249999 has 16 divisors (see below), whose sum is σ = 426859776. Its totient is φ = 336960000.

The previous prime is 380249971. The next prime is 380250019. The reversal of 380249999 is 999942083.

It is a Cunningham number, because it is equal to 19500²-1.

It is a cyclic number.

It is not a de Polignac number, because 380249999 - 2¹⁶ = 380184463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 380249999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380249959) 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, 9749 + ... + 29249.

It is an arithmetic number, because the mean of its divisors is an integer number (26678736).

Almost surely, 2^380249999 is an apocalyptic number.

380249999 is a deficient number, since it is larger than the sum of its proper divisors (46609777).

380249999 is a wasteful number, since it uses less digits than its factorization.

380249999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19586.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 380249999 is about 19499.9999743590. Note that the first 4 decimals coincide. The cubic root of 380249999 is about 724.4744500383.

The spelling of 380249999 in words is "three hundred eighty million, two hundred forty-nine thousand, nine hundred ninety-nine".