400067442 has 24 divisors (see below), whose sum is σ = 886972944. Its totient is φ = 130254264.

The previous prime is 400067429. The next prime is 400067449. The reversal of 400067442 is 244760004.

It is not an unprimeable number, because it can be changed into a prime (400067449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257668 + ... + 259215.

It is an arithmetic number, because the mean of its divisors is an integer number (36957206).

Almost surely, 2^400067442 is an apocalyptic number.

400067442 is an abundant number, since it is smaller than the sum of its proper divisors (486905502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400067442 is a wasteful number, since it uses less digits than its factorization.

400067442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516934 (or 516931 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 400067442 is about 20001.6859789369. The cubic root of 400067442 is about 736.8477071431.

The spelling of 400067442 in words is "four hundred million, sixty-seven thousand, four hundred forty-two".