17420390 has 32 divisors (see below), whose sum is σ = 34122816. Its totient is φ = 6364800.

The previous prime is 17420363. The next prime is 17420401. The reversal of 17420390 is 9302471.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12740 + ... + 14040.

It is an arithmetic number, because the mean of its divisors is an integer number (1066338).

Almost surely, 2^17420390 is an apocalyptic number.

17420390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17420390 is a deficient number, since it is larger than the sum of its proper divisors (16702426).

17420390 is a wasteful number, since it uses less digits than its factorization.

17420390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 17420390 is about 4173.7740715089. The cubic root of 17420390 is about 259.2304166377.

The spelling of 17420390 in words is "seventeen million, four hundred twenty thousand, three hundred ninety".