387726469 has 4 divisors (see below), whose sum is σ = 417551596. Its totient is φ = 357901344.

The previous prime is 387726457. The next prime is 387726473. The reversal of 387726469 is 964627783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105822369 + 281904100 = 10287^2 + 16790^2 .

It is a cyclic number.

It is not a de Polignac number, because 387726469 - 2¹³ = 387718277 is a prime.

It is a super-2 number, since 2×387726469² = 300663629526415922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387726419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14912544 + ... + 14912569.

It is an arithmetic number, because the mean of its divisors is an integer number (104387899).

Almost surely, 2^387726469 is an apocalyptic number.

It is an amenable number.

387726469 is a deficient number, since it is larger than the sum of its proper divisors (29825127).

387726469 is a wasteful number, since it uses less digits than its factorization.

387726469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29825126.

The product of its digits is 3048192, while the sum is 52.

The square root of 387726469 is about 19690.7711631617. The cubic root of 387726469 is about 729.1918679479.

The spelling of 387726469 in words is "three hundred eighty-seven million, seven hundred twenty-six thousand, four hundred sixty-nine".