3420387 has 10 divisors (see below), whose sum is σ = 5109588. Its totient is φ = 2280204.

The previous prime is 3420371. The next prime is 3420401. The reversal of 3420387 is 7830243.

It is not a de Polignac number, because 3420387 - 2⁴ = 3420371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

3420387 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3420387.

It is not an unprimeable number, because it can be changed into a prime (3420337) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 21033 + ... + 21194.

Almost surely, 2^3420387 is an apocalyptic number.

3420387 is a deficient number, since it is larger than the sum of its proper divisors (1689201).

3420387 is an equidigital number, since it uses as much as digits as its factorization.

3420387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42239 (or 42230 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 3420387 is about 1849.4288307475. The cubic root of 3420387 is about 150.6694081740.

The spelling of 3420387 in words is "three million, four hundred twenty thousand, three hundred eighty-seven".