425840387 has 8 divisors (see below), whose sum is σ = 490982496. Its totient is φ = 361775232.

The previous prime is 425840339. The next prime is 425840399. The reversal of 425840387 is 783048524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 425840387 - 2²⁶ = 358731523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425840287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268388 + ... + 269969.

It is an arithmetic number, because the mean of its divisors is an integer number (61372812).

Almost surely, 2^425840387 is an apocalyptic number.

425840387 is a deficient number, since it is larger than the sum of its proper divisors (65142109).

425840387 is a wasteful number, since it uses less digits than its factorization.

425840387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538477.

The product of its (nonzero) digits is 215040, while the sum is 41.

The square root of 425840387 is about 20635.9004407368. The cubic root of 425840387 is about 752.3425347202.

The spelling of 425840387 in words is "four hundred twenty-five million, eight hundred forty thousand, three hundred eighty-seven".