402061648 has 10 divisors (see below), whose sum is σ = 778994474. Its totient is φ = 201030816.

The previous prime is 402061637. The next prime is 402061669. The reversal of 402061648 is 846160204.

It can be written as a sum of positive squares in only one way, i.e., 245611584 + 156450064 = 15672^2 + 12508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12564411 + ... + 12564442.

Almost surely, 2^402061648 is an apocalyptic number.

It is an amenable number.

402061648 is a deficient number, since it is larger than the sum of its proper divisors (376932826).

402061648 is a wasteful number, since it uses less digits than its factorization.

402061648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25128861 (or 25128855 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 402061648 is about 20051.4749582169. The cubic root of 402061648 is about 738.0699938265.

The spelling of 402061648 in words is "four hundred two million, sixty-one thousand, six hundred forty-eight".