400000102 has 4 divisors (see below), whose sum is σ = 600000156. Its totient is φ = 200000050.

The previous prime is 400000091. The next prime is 400000109. The reversal of 400000102 is 201000004.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100000024 + ... + 100000027.

It is an arithmetic number, because the mean of its divisors is an integer number (150000039).

Almost surely, 2^400000102 is an apocalyptic number.

400000102 is a deficient number, since it is larger than the sum of its proper divisors (200000054).

400000102 is a wasteful number, since it uses less digits than its factorization.

400000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200000053.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 400000102 is about 20000.0025499998. The cubic root of 400000102 is about 736.8063623566.

Adding to 400000102 its reverse (201000004), we get a palindrome (601000106).

The spelling of 400000102 in words is "four hundred million, one hundred two", and thus it is an aban number.