407138428 has 6 divisors (see below), whose sum is σ = 712492256. Its totient is φ = 203569212.

The previous prime is 407138419. The next prime is 407138449. The reversal of 407138428 is 824831704.

It is a super-3 number, since 3×407138428³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 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, 50892300 + ... + 50892307.

Almost surely, 2^407138428 is an apocalyptic number.

It is an amenable number.

407138428 is a deficient number, since it is larger than the sum of its proper divisors (305353828).

407138428 is a wasteful number, since it uses less digits than its factorization.

407138428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101784611 (or 101784609 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 407138428 is about 20177.6715207677. The cubic root of 407138428 is about 741.1635141625.

It can be divided in two parts, 40713 and 8428, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 407138428 in words is "four hundred seven million, one hundred thirty-eight thousand, four hundred twenty-eight".