429661378 has 4 divisors (see below), whose sum is σ = 644492070. Its totient is φ = 214830688.

The previous prime is 429661343. The next prime is 429661381. The reversal of 429661378 is 873166924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 352801089 + 76860289 = 18783^2 + 8767^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107415343 + ... + 107415346.

Almost surely, 2^429661378 is an apocalyptic number.

429661378 is a deficient number, since it is larger than the sum of its proper divisors (214830692).

429661378 is a wasteful number, since it uses less digits than its factorization.

429661378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214830691.

The product of its digits is 435456, while the sum is 46.

The square root of 429661378 is about 20728.2748437973. The cubic root of 429661378 is about 754.5860502921.

It can be divided in two parts, 42966 and 1378, that added together give a palindrome (44344).

The spelling of 429661378 in words is "four hundred twenty-nine million, six hundred sixty-one thousand, three hundred seventy-eight".