420189749 has 16 divisors (see below), whose sum is σ = 494640000. Its totient is φ = 356796636.

The previous prime is 420189743. The next prime is 420189761. The reversal of 420189749 is 947981024.

The cubic root of 420189749 is 749.

It is a perfect power (a cube), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-420189749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420189743) 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, 3926954 + ... + 3927060.

It is an arithmetic number, because the mean of its divisors is an integer number (30915000).

Almost surely, 2^420189749 is an apocalyptic number.

420189749 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

420189749 is a deficient number, since it is larger than the sum of its proper divisors (74450251).

420189749 is an frugal number, since it uses more digits than its factorization.

420189749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 420189749 is about 20498.5304107392.

The spelling of 420189749 in words is "four hundred twenty million, one hundred eighty-nine thousand, seven hundred forty-nine".