428261240 has 32 divisors (see below), whose sum is σ = 1051187760. Its totient is φ = 155731200.

The previous prime is 428261213. The next prime is 428261243. The reversal of 428261240 is 42162824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428261243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486221 + ... + 487100.

Almost surely, 2^428261240 is an apocalyptic number.

428261240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428261240 is an abundant number, since it is smaller than the sum of its proper divisors (622926520).

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

428261240 is a wasteful number, since it uses less digits than its factorization.

428261240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973343 (or 973339 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 428261240 is about 20694.4736584432. The cubic root of 428261240 is about 753.7655015435.

The spelling of 428261240 in words is "four hundred twenty-eight million, two hundred sixty-one thousand, two hundred forty".