400021702 has 8 divisors (see below), whose sum is σ = 600134256. Its totient is φ = 199976952.

The previous prime is 400021693. The next prime is 400021717. The reversal of 400021702 is 207120004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068 + ... + 28360.

It is an arithmetic number, because the mean of its divisors is an integer number (75016782).

Almost surely, 2^400021702 is an apocalyptic number.

400021702 is a deficient number, since it is larger than the sum of its proper divisors (200112554).

400021702 is a wasteful number, since it uses less digits than its factorization.

400021702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33902.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 400021702 is about 20000.5425426412. The cubic root of 400021702 is about 736.8196246290.

Adding to 400021702 its reverse (207120004), we get a palindrome (607141706).

The spelling of 400021702 in words is "four hundred million, twenty-one thousand, seven hundred two".