1420694550 has 144 divisors (see below), whose sum is σ = 4277016432. Its totient is φ = 335059200.

The previous prime is 1420694507. The next prime is 1420694603. The reversal of 1420694550 is 554960241.

1420694550 is a `hidden beast` number, since 1 + 42 + 0 + 69 + 4 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 179272 + ... + 187028.

It is an arithmetic number, because the mean of its divisors is an integer number (29701503).

Almost surely, 2^1420694550 is an apocalyptic number.

1420694550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1420694550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138508216).

1420694550 is an abundant number, since it is smaller than the sum of its proper divisors (2856321882).

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

1420694550 is a wasteful number, since it uses less digits than its factorization.

1420694550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7823 (or 7815 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1420694550 is about 37692.1019578373. The cubic root of 1420694550 is about 1124.1740901094.

The spelling of 1420694550 in words is "one billion, four hundred twenty million, six hundred ninety-four thousand, five hundred fifty".