402169424 has 10 divisors (see below), whose sum is σ = 779203290. Its totient is φ = 201084704.

The previous prime is 402169423. The next prime is 402169457. The reversal of 402169424 is 424961204.

It can be written as a sum of positive squares in only one way, i.e., 371255824 + 30913600 = 19268^2 + 5560^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402169423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12567779 + ... + 12567810.

It is an arithmetic number, because the mean of its divisors is an integer number (77920329).

Almost surely, 2^402169424 is an apocalyptic number.

It is an amenable number.

402169424 is a deficient number, since it is larger than the sum of its proper divisors (377033866).

402169424 is a wasteful number, since it uses less digits than its factorization.

402169424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25135597 (or 25135591 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 402169424 is about 20054.1622612364. The cubic root of 402169424 is about 738.1359365540.

The spelling of 402169424 in words is "four hundred two million, one hundred sixty-nine thousand, four hundred twenty-four".