402950821 has 8 divisors (see below), whose sum is σ = 495939584. Its totient is φ = 318818160.

The previous prime is 402950761. The next prime is 402950827. The reversal of 402950821 is 128059204.

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

It is a cyclic number.

It is not a de Polignac number, because 402950821 - 2¹⁵ = 402918053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402950827) 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, 2213925 + ... + 2214106.

It is an arithmetic number, because the mean of its divisors is an integer number (61992448).

Almost surely, 2^402950821 is an apocalyptic number.

It is an amenable number.

402950821 is a deficient number, since it is larger than the sum of its proper divisors (92988763).

402950821 is a wasteful number, since it uses less digits than its factorization.

402950821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428051.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 402950821 is about 20073.6349722715. The cubic root of 402950821 is about 738.6136821873.

The spelling of 402950821 in words is "four hundred two million, nine hundred fifty thousand, eight hundred twenty-one".