429221890 has 16 divisors (see below), whose sum is σ = 772850232. Its totient is φ = 171633024.

The previous prime is 429221861. The next prime is 429221921. The reversal of 429221890 is 98122924.

It can be written as a sum of positive squares in 4 ways, for example, as 350775441 + 78446449 = 18729^2 + 8857^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41302 + ... + 50638.

Almost surely, 2^429221890 is an apocalyptic number.

429221890 is a deficient number, since it is larger than the sum of its proper divisors (343628342).

429221890 is a wasteful number, since it uses less digits than its factorization.

429221890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13941.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 429221890 is about 20717.6709598352. The cubic root of 429221890 is about 754.3286812201.

The spelling of 429221890 in words is "four hundred twenty-nine million, two hundred twenty-one thousand, eight hundred ninety".