1400142620 has 96 divisors (see below), whose sum is σ = 3153185280. Its totient is φ = 521256960.

The previous prime is 1400142613. The next prime is 1400142637. The reversal of 1400142620 is 262410041.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1400142592 and 1400142601.

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 31 ways as a sum of consecutive naturals, for example, 2306357 + ... + 2306963.

It is an arithmetic number, because the mean of its divisors is an integer number (32845680).

Almost surely, 2^1400142620 is an apocalyptic number.

1400142620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400142620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576592640).

1400142620 is an abundant number, since it is smaller than the sum of its proper divisors (1753042660).

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

1400142620 is a wasteful number, since it uses less digits than its factorization.

1400142620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1400142620 is about 37418.4796591203. The cubic root of 1400142620 is about 1118.7269282717.

Adding to 1400142620 its reverse (262410041), we get a palindrome (1662552661).

The spelling of 1400142620 in words is "one billion, four hundred million, one hundred forty-two thousand, six hundred twenty".