428323629 has 8 divisors (see below), whose sum is σ = 575595520. Its totient is φ = 283300416.

The previous prime is 428323603. The next prime is 428323673. The reversal of 428323629 is 926323824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428323629 - 2⁷ = 428323501 is a prime.

It is a super-2 number, since 2×428323629² = 366922262319459282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428323229) 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, 561724 + ... + 562485.

It is an arithmetic number, because the mean of its divisors is an integer number (71949440).

Almost surely, 2^428323629 is an apocalyptic number.

It is an amenable number.

428323629 is a deficient number, since it is larger than the sum of its proper divisors (147271891).

428323629 is a wasteful number, since it uses less digits than its factorization.

428323629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124339.

The product of its digits is 124416, while the sum is 39.

The square root of 428323629 is about 20695.9809866554. The cubic root of 428323629 is about 753.8021025618.

The spelling of 428323629 in words is "four hundred twenty-eight million, three hundred twenty-three thousand, six hundred twenty-nine".