787142420 has 24 divisors (see below), whose sum is σ = 1659155400. Its totient is φ = 313684352.

The previous prime is 787142413. The next prime is 787142443. The reversal of 787142420 is 24241787.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29571844 + 757570576 = 5438^2 + 27524^2 .

It is a congruent number.

It is an unprimeable number.

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, 67775 + ... + 78534.

It is an arithmetic number, because the mean of its divisors is an integer number (69131475).

Almost surely, 2^787142420 is an apocalyptic number.

It is an amenable number.

787142420 is an abundant number, since it is smaller than the sum of its proper divisors (872012980).

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

787142420 is a wasteful number, since it uses less digits than its factorization.

787142420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146587 (or 146585 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 787142420 is about 28056.0585257445. The cubic root of 787142420 is about 923.3175826820.

The spelling of 787142420 in words is "seven hundred eighty-seven million, one hundred forty-two thousand, four hundred twenty".