400252154 has 8 divisors (see below), whose sum is σ = 603000660. Its totient is φ = 199251936.

The previous prime is 400252147. The next prime is 400252159. The reversal of 400252154 is 451252004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 399400225 + 851929 = 19985^2 + 923^2 .

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

It is a super-3 number, since 3×400252154³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (400252159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436499 + ... + 437414.

Almost surely, 2^400252154 is an apocalyptic number.

400252154 is a deficient number, since it is larger than the sum of its proper divisors (202748506).

400252154 is a wasteful number, since it uses less digits than its factorization.

400252154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874144.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 400252154 is about 20006.3028568499. The cubic root of 400252154 is about 736.9610910863.

The spelling of 400252154 in words is "four hundred million, two hundred fifty-two thousand, one hundred fifty-four".