402428441 has 4 divisors (see below), whose sum is σ = 403479552. Its totient is φ = 401377332.

The previous prime is 402428431. The next prime is 402428461. The reversal of 402428441 is 144824204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402428441 - 2¹⁴ = 402412057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402428431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524981 + ... + 525746.

It is an arithmetic number, because the mean of its divisors is an integer number (100869888).

Almost surely, 2^402428441 is an apocalyptic number.

It is an amenable number.

402428441 is a deficient number, since it is larger than the sum of its proper divisors (1051111).

402428441 is a wasteful number, since it uses less digits than its factorization.

402428441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051110.

The product of its (nonzero) digits is 8192, while the sum is 29.

The square root of 402428441 is about 20060.6191579423. The cubic root of 402428441 is about 738.2943678966.

The spelling of 402428441 in words is "four hundred two million, four hundred twenty-eight thousand, four hundred forty-one".