442397487 has 16 divisors (see below), whose sum is σ = 676760832. Its totient is φ = 251811840.

The previous prime is 442397467. The next prime is 442397489. The reversal of 442397487 is 784793244.

It is not a de Polignac number, because 442397487 - 2⁸ = 442397231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442397489) 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, 35589 + ... + 46382.

It is an arithmetic number, because the mean of its divisors is an integer number (42297552).

Almost surely, 2^442397487 is an apocalyptic number.

442397487 is a deficient number, since it is larger than the sum of its proper divisors (234363345).

442397487 is a wasteful number, since it uses less digits than its factorization.

442397487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82238.

The product of its digits is 1354752, while the sum is 48.

The square root of 442397487 is about 21033.2471815457. The cubic root of 442397487 is about 761.9694344351.

The spelling of 442397487 in words is "four hundred forty-two million, three hundred ninety-seven thousand, four hundred eighty-seven".