201429778 has 16 divisors (see below), whose sum is σ = 330787296. Its totient is φ = 91232640.

The previous prime is 201429757. The next prime is 201429779. The reversal of 201429778 is 877924102.

It is a self number, because there is not a number n which added to its sum of digits gives 201429778.

It is not an unprimeable number, because it can be changed into a prime (201429779) 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, 9951 + ... + 22402.

It is an arithmetic number, because the mean of its divisors is an integer number (20674206).

Almost surely, 2^201429778 is an apocalyptic number.

201429778 is a deficient number, since it is larger than the sum of its proper divisors (129357518).

201429778 is a wasteful number, since it uses less digits than its factorization.

201429778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32649.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 201429778 is about 14192.5958865882. The cubic root of 201429778 is about 586.1938053650.

The spelling of 201429778 in words is "two hundred one million, four hundred twenty-nine thousand, seven hundred seventy-eight".