387421443 has 12 divisors (see below), whose sum is σ = 572623480. Its totient is φ = 252274176.

The previous prime is 387421429. The next prime is 387421459. The reversal of 387421443 is 344124783.

It is not a de Polignac number, because 387421443 - 2¹² = 387417347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 387421398 and 387421407.

It is not an unprimeable number, because it can be changed into a prime (387421943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 500158 + ... + 500931.

Almost surely, 2^387421443 is an apocalyptic number.

387421443 is a deficient number, since it is larger than the sum of its proper divisors (185202037).

387421443 is a wasteful number, since it uses less digits than its factorization.

387421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001138 (or 1001135 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 387421443 is about 19683.0242340957. The cubic root of 387421443 is about 729.0005983726. Note that the first 3 decimals are identical.

It can be divided in two parts, 387 and 421443, that multiplied together give a square (163098441 = 12771²).

The spelling of 387421443 in words is "three hundred eighty-seven million, four hundred twenty-one thousand, four hundred forty-three".